Rule 8.3 - BANCO SANTANDER SA

FORM 8.3

    DEALINGS BY PERSONS WITH INTERESTS IN SECURITIES REPRESENTING 1% OR MORE
              (Rule 8.3 of the City Code on Takeovers and Mergers)


1.   KEY INFORMATION

Name of person dealing        BARCLAYS PLC
(Note 1)
Company dealt in              BANCO SANTANDER SA
Class of relevant security    EUR0.50(REGD)
to which the dealings being
disclosed relate (Note 2)
Date of dealing               15 September 2008

2.   INTERESTS, SHORT POSITIONS AND RIGHTS TO SUBSCRIBE

(a)  Interests and short positions (following dealing) in the class of relevant
security dealt in (Note 3)

                            Long                     Short

                      Number       (%)         Number       (%)

(1) Relevant     304,385,253     4.87%      2,944,064     0.05%
securities
(2) Derivatives   45,965,730     0.73%     78,325,929     1.25%
(other than
options)
(3) Options and   33,483,385     0.54%     30,386,988     0.49%
agreements to
purchase/sell
Total            383,834,368     6.14%    111,656,981     1.79%


(b)  Interests and short positions in relevant securities of the company, other
     than the class dealt in (Note 3)

Class of                    Long                     Short
relevant
security:

                  Number              (%)   Number              (%)

(1) Relevant
securities

(2) Derivatives
(other than
options)

(3) Options and
agreements to
purchase/sell

Total


  (c)  Rights to subscribe (Note 3)

Class of relevant security:   Details



3.   DEALINGS (Note 4)

  (a)  Purchases and sales

Purchase/sale      Number of           Price per unit
                   Securities
Purchase           400                 10.85
Purchase           9,380               10.5632
Purchase           1,000               10.85
Purchase           8,404               10.56
Purchase           57,200              10.6158
Purchase           400                 10.7
Purchase           202,107             10.9235
Purchase           700                 10.8
Purchase           2,800               10.7
Purchase           1,000               10.67
Purchase           2,000               10.5
Purchase           300                 10.96
Purchase           750                 10.98
Purchase           235                 10.76
Purchase           23,778              11.34
Purchase           616                 11.16
Purchase           1,000               10.52
Purchase           184                 10.84
Purchase           20                  10.53
Purchase           500                 10.95
Purchase           1,205               10.9672
Purchase           120,405             10.56
Purchase           200                 10.63
Purchase           4,000               10.6
Purchase           571,547             10.6156
Purchase           1,192,895           10.94
Purchase           500                 10.75
Purchase           101,197             10.56
Purchase           2,000               10.5
Purchase           275                 10.91
Purchase           1,135,275           10.56
Purchase           34,174              10.5767
Purchase           200                 10.75
Purchase           379,895             10.56
Purchase           1,400,000           10.55
Purchase           4,956               10.6287
Purchase           850,000             10.561
Purchase           1,400,000           10.55
Purchase           1,192,895           10.94
Purchase           500                 10.75
Purchase           1,100               10.93
Purchase           300                 10.64
Purchase           560                 10.69
Purchase           600                 10.49
Purchase           750                 10.7
Purchase           185                 10.63
Purchase           141                 10.86
Purchase           379,895             10.56
Purchase           2,330               10.72
Purchase           80                  10.8
Purchase           1,959,800           10.6
Purchase           10,000              10.95
Purchase           300                 10.67
Purchase           100                 10.71
Purchase           1,100               10.85
Purchase           200                 10.6
Purchase           500                 10.65
Purchase           1,400               10.74
Purchase           24,605              11.12
Purchase           500                 10.64
Purchase           300                 10.65
Purchase           90                  10.94
Purchase           26,276              10.63
Sale               6,084               10.698
Sale               10,126              10.6581
Sale               4,602               10.6581
Sale               8,649               10.7683
Sale               30,963              10.7683
Sale               3,733               10.6979
Sale               14,095              10.7683
Sale               19,467              10.6581
Sale               22,989              10.93
Sale               2,741               10.6981
Sale               6,316               10.7681
Sale               7,554               10.56
Sale               15,108              10.56
Sale               12,307              10.7683
Sale               2,704               10.56
Sale               4,024               10.6581
Sale               13,375              10.698
Sale               59,543              10.7683
Sale               25,717              10.698
Sale               197,971             10.7683
Sale               85,442              10.698
Sale               64,694              10.6581
Sale               86,400              10.56
Sale               38,469              10.56
Sale               5,311               10.698
Sale               56,562              10.9281
Sale               11,317              10.7396
Sale               1,192,895           10.94
Sale               4,956               10.6778
Sale               1,400,000           10.55
Sale               465                 10.65
Sale               6,100               11.2
Sale               280                 10.93
Sale               1,192,895           10.94
Sale               2,650,000           10.56
Sale               1,135,275           11.34
Sale               7,952               10.5578
Sale               1,791               10.6582
Sale               3,037               10.56
Sale               100                 10.88
Sale               2,830               10.6581
Sale               6,337               10.93
Sale               1,600,000           10.56
Sale               379,895             10.56
Sale               23,778              11.34
Sale               4,250               Transfer
Sale               1,959,800           10.6
Sale               224                 10.93
Sale               372,003             10.9233
Sale               379,895             10.56
Sale               9,380               10.6768
Sale               3,145               11.2
Sale               202,107             10.9235
Sale               2,072               10.6582
Sale               2,742               10.6581
Sale               7,000               10.764
Sale               1,103               10.698
Sale               826                 10.6584
Sale               1,522               10.7677
Sale               665                 10.6981
Sale               502                 10.6584
Sale               6,336               10.6581
Sale               19,383              10.7683
Sale               8,367               10.698
Sale               2,658               10.6582
Sale               8,101               10.7682
Sale               202,107             10.9236
Sale               8,399               10.7682
Sale               94,153              10.685
Sale               3,635               10.6979
Sale               243                 10.6586
Sale               734                 10.7677
Sale               324                 10.6981
Sale               8,404               10.56
Sale               310                 11.2
Sale               461                 10.6586
Sale               1,426               10.7678
Sale               622                 10.6981
Sale               43,288              10.7683
Sale               18,699              10.698
Sale               1,276               10.6582
Sale               3,511               10.698
Sale               4,333               10.7681
Sale               181                 10.6581
Sale               240                 10.6983
Sale               1,659               10.6582
Sale               5,047               10.7681
Sale               2,190               10.698
Sale               785                 10.6583
Sale               1,033               10.698
Sale               2,371               10.7679
Sale               5,394               10.7681
Sale               2,344               10.698
Sale               1,771               10.6582
Sale               2,524               10.7679
Sale               1,881               10.698
Sale               8,632               10.698
Sale               937                 10.6582
Sale               1,234               10.6981
Sale               2,838               10.768
Sale               1,152               10.6582
Sale               3,508               10.768
Sale               1,521               10.698
Sale               9,008               10.7684
Sale               2,941               10.6581
Sale               3,885               10.698
Sale               1,470               10.6582
Sale               4,478               10.7681
Sale               1,944               10.698
Sale               1,423               10.6582
Sale               17,566              10.698
Sale               14,155              10.6581
Sale               450                 10.6983
Sale               336                 10.6586
Sale               2,198               10.768
Sale               957                 10.698
Sale               724                 10.6582
Sale               4,549               10.698
Sale               10,532              10.7683
Sale               3,445               10.6581
Sale               1,848               10.6582
Sale               2,442               10.698
Sale               1,007               10.7677
Sale               40,678              10.7683
Sale               440                 10.6982
Sale               13,300              10.6581
Sale               2,648               10.6582
Sale               8,079               10.7682
Sale               3,506               10.698
Sale               4,049               10.7681
Sale               1,332               10.6582
Sale               1,758               10.698
Sale               5,450               10.7681
Sale               2,366               10.698
Sale               544                 10.7678
Sale               3,889               10.768
Sale               1,689               10.698
Sale               5,620               10.7681
Sale               716                 10.6583
Sale               6,533               10.6581
Sale               19,996              10.7683
Sale               22,001              10.7683
Sale               7,192               10.6581
Sale               9,498               10.698
Sale               3,957               10.7288
Sale               4,448               10.6581
Sale               5,877               10.698
Sale               48,259              10.7298
Sale               13,615              10.7683
Sale               7,909               10.7298
Sale               1,019               10.7677
Sale               649                 10.7288
Sale               40,654              10.56
Sale               948                 10.6981
Sale               1,593               10.7677
Sale               695                 10.6981
Sale               519                 10.6585
Sale               5,836               10.7298
Sale               478                 10.7288
Sale               551                 10.6981
Sale               1,257               10.7677
Sale               378                 10.7288
Sale               414                 10.6583
Sale               4,612               10.7298
Sale               334                 10.6584
Sale               2,176               10.7679

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD             Long         7952          10.5577
CFD             Long         45275         10.56
CFD             Long         4956          10.6777
CFD             Long         11317         10.7396
CFD             Long         372003        10.9232
CFD             Long         56562         10.928
CFD             Short        34174         10.5767
CFD             Short        571547        10.6156
CFD             Short        57200         10.6158
CFD             Short        4956          10.6286
CFD             Short        42814         10.6849
CFD             Short        4201          10.7069

(c)  Options transactions in respect of existing securities

(i)  Writing, selling, purchasing or varying


Product name,   Writing,          Number of          Exercise  Type, e.g.      Expiry      Option money
e.g. call       selling,          securities to      price     American,       date        paid/received
option          purchasing,       which the option             European etc.               per unit (GBP)
                varying etc.      relates (GBP)



(ii) Exercising

Product name, e.g.  Number of           Exercise price per
call option         securities          unit (Note 5)



(d)  Other dealings (including new securities) (Note 4)


Nature of transaction Details           Price per unit
(Note 8)                                (if applicable)
                                        (Note 5)


4.   OTHER INFORMATION
None

Agreements, arrangements or understandings relating to options or derivatives


Full details of any agreement, arrangement or understanding between the
person disclosing and any other person relating to the voting rights of
any relevant securities under any option referred to on this form or
relating to the voting rights or future acquisition or disposal of any
relevant securities to which any derivative referred to on this form is
referenced.  If none, this should be stated.




Is a Supplemental Form 8 attached? (Note 9)                 YES


Date of disclosure                         16 September 2008
Contact name                               Geoff Smith
Telephone number                           020 7116 2913
If a connected EFM, name of
offeree/offeror with which connected
If a connected EFM, state nature of
connection (Note 10)

SUPPLEMENTAL FORM 8

DETAILS OF OPEN POSITIONS
(This form should be attached to Form 8.1, Form 8.1(b)(ii) or Form 8.3, as appropriate)


OPEN POSITIONS (Note 1)
Product name,     Written or  Number of securities   Exercise price   Type, e.g.     Expiry date
e.g. call option  purchased   to which the option    (Note 2)         American,
                              or derivative relates                   European etc.
Option            Purchased   -500,000               12.0000          AMER 19/12/2008
Option            Purchased   -1,000,000             12.0000          EURO 18/12/2009
Option            Purchased   -1,000,000             12.0000          AMER 19/12/2008
Option            Purchased   -1,000,000             14.0000          AMER 19/12/2008
Option            Purchased   -1,000,000             14.0000          EURO 19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO 19/06/2009
Option            Purchased   -1,000,000             15.0000          EURO 17/12/2010
Option            Purchased   -304,461               9.1900           EURO 19/12/2008
Option            Purchased   -750,000               14.0000          AMER 18/12/2009
Option            Purchased   -2,000,000             21.0000          AMER 19/12/2008
Option            Purchased   -500,000               12.0000          AMER 19/12/2008
Option            Purchased   -500,000               12.0000          AMER 19/12/2008
Option            Purchased   -500,000               12.0000          AMER 19/12/2008
Option            Purchased   -500,000               14.0000          EURO 18/12/2009
Option            Purchased   -500,000               14.0000          EURO 18/12/2009
Option            Purchased   -500,000               14.0000          EURO 18/12/2009
Option            Purchased   -55,000                12.0000          EURO 19/12/2008
Option            Purchased   -750,000               14.0000          AMER 18/12/2009
Option            Purchased   7,500                  12.0000          EURO 19/12/2008
Option            Purchased   -20,000                12.0000          EURO 18/12/2009
Option            Purchased   -5,000                 12.0000          EURO 19/06/2009
Option            Purchased   -5,000                 12.0000          EURO 19/06/2009
Option            Purchased   -5,000                 15.0000          EURO 19/09/2008
Option            Purchased   -5,000                 9.5000           EURO 19/12/2008
Option            Purchased   -2,500                 14.0000          EURO 19/12/2008
Option            Purchased   -160                   14.0000          EURO 19/09/2008
Option            Purchased   -1,000,000             12.0000          EURO 18/12/2009
Option            Purchased   5,000                  14.0000          EURO 19/09/2008
Option            Purchased   -1,000,000             12.0000          AMER 19/12/2008
Option            Purchased   10,000                 12.0000          EURO 19/12/2008
Option            Purchased   20,000                 12.0000          EURO 18/12/2009
Option            Purchased   55,000                 12.0000          EURO 19/12/2008
Option            Purchased   120,000                10.5000          EURO 19/06/2009
Option            Purchased   -7,500,000             0.0100           EURO 19/09/2008
Option            Purchased   -4,369,700             0.0100           EURO 19/12/2008
Option            Purchased   -304,461               9.1900           EURO 19/12/2008
Option            Purchased   1,000                  11.0000          EURO 19/09/2008
Option            Purchased   1,000,000              11.0000          AMER 19/09/2008
Option            Purchased   500,000                10.5000          AMER 19/12/2008
Option            Purchased   500,000                10.5000          AMER 19/06/2009
Option            Purchased   500,000                12.0000          AMER 19/12/2008
Option            Purchased   500,000                14.0000          EURO 18/12/2009
Option            Purchased   500,000                14.0000          EURO 18/12/2009
Option            Purchased   500,000                14.0000          EURO 18/12/2009
Option            Purchased   -410,000               11.9238          EURO 29/09/2008
Option            Purchased   500,000                16.0000          AMER 18/12/2009
Option            Purchased   250,000                10.5000          AMER 19/12/2008
Option            Purchased   1,000,000              12.0000          EURO 18/12/2009
Option            Purchased   1,000,000              12.0000          EURO 18/12/2009
Option            Purchased   1,000,000              14.0000          EURO 19/12/2008
Option            Purchased   1,000,000              15.0000          EURO 19/06/2009
Option            Purchased   1,000,000              15.0000          EURO 17/12/2010
Option            Purchased   4,369,700              0.0100           EURO 19/12/2008
Option            Purchased   7,500,000              0.0100           EURO 19/09/2008
Option            Purchased   500,000                16.0000          AMER 18/09/2009
Option            Purchased   -135,012               14.0200          EURO 18/12/2009
Option            Purchased   -250,000               12.5000          AMER 18/12/2009
Option            Purchased   -250,000               12.5000          AMER 18/12/2009
Option            Purchased   -250,000               14.5000          AMER 19/12/2008
Option            Purchased   -250,000               14.5000          AMER 19/12/2008
Option            Purchased   -195,381               9.6300           EURO 19/12/2008
Option            Purchased   -195,381               9.6300           EURO 19/12/2008
Option            Purchased   -192,806               9.9600           EURO 19/12/2008
Option            Purchased   500,000                10.0000          AMER 19/12/2008
Option            Purchased   -135,012               14.0200          EURO 18/12/2009
Option            Purchased   410,000                10.5210          EURO 29/09/2008
Option            Purchased   -114,995               10.0100          EURO 19/12/2008
Option            Purchased   -114,995               10.0100          EURO 19/12/2008
Option            Purchased   -62,159                8.7900           EURO 19/12/2008
Option            Purchased   -62,159                8.7900           EURO 19/12/2008
Option            Purchased   19,900                 13.0400          EURO 03/10/2008
Option            Purchased   215,285                9.2900           EURO 20/04/2009
Option            Purchased   10,000,000             14.5400          EURO 23/02/2010
Option            Purchased   -192,806               9.9600           EURO 19/12/2008

Notes

1. Where there are open option positions or open derivative positions (except for CFDs), full details should be given.
Full details of any  existing agreements to purchase or to sell  should also be given on this form.

2. For all prices and other monetary amounts, the currency must be stated.

For details of the Code's dealing disclosure requirements, see Rule 8 and its Notes which can be viewed on the Takeover
Panel's website at www.thetakeoverpanel.org.uk