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               22 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     289,041,584     4.62%      5,979,763     0.10%
securities
(2) Derivatives   46,368,632     0.74%     67,250,086     1.08%
(other than
options)
(3) Options and   21,450,185     0.34%     17,772,128     0.28%
agreements to
purchase/sell
Total            356,860,401     5.71%     91,001,977     1.46%


(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           4,211               11.2400 EUR
Purchase           144,135             10.8000 EUR
Purchase           108,157             10.8000 EUR
Purchase           300,000             10.7349 EUR
Purchase           996                 11.0413 EUR
Purchase           508,500             11.2400 EUR
Purchase           1,100               11.0000 EUR
Purchase           2,563               11.1115 EUR
Purchase           7,554               10.8000 EUR
Purchase           3,100               11.1074 EUR
Purchase           300                 11.0500 EUR
Purchase           600,563             10.8003 EUR
Purchase           16,000              14.0000 EUR
Purchase           16,000              14.0000 EUR
Purchase           2,090               11.2400 EUR
Purchase           540                 11.2800 EUR
Purchase           803                 11.2300 EUR
Purchase           9,174               11.2400 EUR
Purchase           8,897               10.9072 EUR
Purchase           135,700             11.2400 EUR
Purchase           4,746               11.2400 EUR
Purchase           1,335               10.8000 EUR
Purchase           30,168              11.2400 EUR
Purchase           9                   11.2400 EUR
Purchase           1,400               10.9900 EUR
Purchase           993                 11.2400 EUR
Purchase           20,531              10.8000 EUR
Purchase           149,279             10.8000 EUR
Purchase           2,567               11.2400 EUR
Purchase           5,828               11.0069 EUR
Purchase           1,000               11.2500 EUR
Sale               1,000               11.2000 EUR
Sale               9,174               11.3705 EUR
Sale               8,897               10.7976 EUR
Sale               45,000              10.7500 EUR
Sale               2,262               11.3466 EUR
Sale               195,164             10.9411 EUR
Sale               84,506              10.9412 EUR
Sale               993                 11.2400 EUR
Sale               6,759               10.8000 EUR
Sale               15,000              10.7300 EUR
Sale               3,700               11.0920 EUR
Sale               1,335               11.2400 EUR
Sale               1,620               11.0950 EUR
Sale               1,016               11.0950 EUR
Sale               52,909              10.9399 EUR
Sale               2,318               11.0919 EUR
Sale               180,929             11.1491 EUR
Sale               60,056              10.8000 EUR
Sale               36,540              10.8000 EUR
Sale               9,700               11.2978 EUR
Sale               300                 11.2700 EUR
Sale               400                 11.2700 EUR
Sale               2,567               11.2400 EUR
Sale               2,843               11.3100 EUR
Sale               4,746               11.2400 EUR
Sale               4,211               11.2400 EUR
Sale               547                 11.0200 EUR
Sale               3,706               10.8000 EUR
Sale               16,000              14.0000 EUR
Sale               9                   11.2400 EUR
Sale               30,168              11.2400 EUR
Sale               6,300               11.2284 EUR
Sale               10,791              10.6600 EUR
Sale               800                 11.1600 EUR
Sale               5,000               11.2800 EUR
Sale               9,174               11.2400 EUR
Sale               2,509               10.6800 EUR
Sale               188                 11.3300 EUR
Sale               953                 11.0300 EUR
Sale               2,702               11.2000 EUR
Sale               192,000             11.1800 EUR
Sale               3,609               11.1683 EUR
Sale               56,139              11.0920 EUR
Sale               508,500             11.2400 EUR
Sale               8,552               11.0920 EUR
Sale               15,000              10.7700 EUR
Sale               135,700             11.2400 EUR
Sale               1,000               11.2700 EUR
Sale               315,514             11.1834 EUR
Sale               248                 11.0950 EUR
Sale               42,486              11.1554 EUR
Sale               23,786              11.1554 EUR
Sale               144                 11.0950 EUR
Sale               7,463               10.9367 EUR
Sale               323                 11.0919 EUR
Sale               295                 11.0920 EUR
Sale               111,828             10.9412 EUR
Sale               6,857               10.9365 EUR
Sale               5,746               11.0920 EUR
Sale               12,881              10.9381 EUR
Sale               559                 11.0919 EUR
Sale               1,519               11.0950 EUR
Sale               79,171              10.9403 EUR
Sale               3,468               11.0919 EUR
Sale               4,904               11.0920 EUR
Sale               24,552              11.0950 EUR
Sale               132                 11.0950 EUR
Sale               7,496               11.2400 EUR
Sale               518                 11.0700 EUR
Sale               64,131              10.9401 EUR
Sale               2,808               11.0920 EUR
Sale               1,232               11.0950 EUR
Sale               73,997              11.4000 EUR
Sale               1,425               11.2249 EUR
Sale               165,767             10.9412 EUR
Sale               37,981              11.1554 EUR
Sale               3,176               11.0950 EUR
Sale               678,580             11.1554 EUR
Sale               17,973              11.2249 EUR
Sale               119,671             10.9412 EUR
Sale               2,293               11.0950 EUR
Sale               5,246               11.0920 EUR
Sale               2,512               11.0950 EUR
Sale               131,092             10.9412 EUR
Sale               258                 11.0950 EUR
Sale               7,264               11.0920 EUR
Sale               79,575              10.9408 EUR
Sale               1,603               11.0919 EUR
Sale               483                 11.0950 EUR
Sale               25,132              10.9393 EUR
Sale               1,099               11.0918 EUR
Sale               1,683               11.0919 EUR
Sale               38,466              10.9397 EUR
Sale               2,143               11.0950 EUR
Sale               3,487               11.0919 EUR
Sale               1,245               11.0919 EUR
Sale               1,527               11.0950 EUR
Sale               7,415               11.0950 EUR
Sale               16,950              11.0920 EUR
Sale               386,901             10.9410 EUR
Sale               1,060               11.0700 EUR
Sale               1,281,238           10.9411 EUR
Sale               2,090               11.2400 EUR
Sale               739                 11.0950 EUR
Sale               1,371               11.0950 EUR
Sale               586                 11.0919 EUR
Sale               13,402              10.9379 EUR
Sale               1,334               11.0950 EUR
Sale               69,501              10.9402 EUR
Sale               3,045               11.0919 EUR
Sale               1,622               11.0919 EUR
Sale               712                 11.0950 EUR
Sale               704                 11.0950 EUR
Sale               3,128               11.0919 EUR
Sale               36,635              10.9395 EUR
Sale               71,408              10.9402 EUR
Sale               1,032               11.0950 EUR
Sale               53,720              10.9400 EUR
Sale               2,354               11.0920 EUR
Sale               28,462              10.9393 EUR
Sale               547                 11.0950 EUR
Sale               3,739               11.0950 EUR
Sale               37,050              10.9395 EUR

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          8897          10.7975
CFD            Long          6300          11.2284
CFD            Long          9700          11.2977
CFD            Short         4513          10.8
CFD            Short         8897          10.9071
CFD            Short         1400          10.99
CFD            Short         3100          11.1074
CFD            Short         2563          11.1115
Swap           Short         1             38.06

(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)

Call            Selling            600,000           12.5      AMER           19/12/2008     0.37
(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                         23 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   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   -260,000               10.5000          EURO           19/12/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -410,000               11.9238          EURO           29/09/2008
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
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               12.0000          AMER           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   -1,000,000             14.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             14.0000          EURO           19/12/2008
Option            Purchased   -55,000                12.0000          EURO           19/12/2008
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
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                 9.5000           EURO           19/12/2008
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   55,000                 12.0000          EURO           19/12/2008
Option            Purchased   120,000                10.5000          EURO           19/06/2009
Option            Purchased   -2,000,000             21.0000          AMER           19/12/2008
Option            Purchased   -1,500,000             10.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -250,000               14.5000          AMER           19/12/2008
Option            Purchased   7,500                  12.0000          EURO           19/12/2008
Option            Purchased   600,000                12.5000          AMER           19/12/2008
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   500,000                10.5000          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   260,000                9.7500           EURO           19/12/2008
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           17/12/2010
Option            Purchased   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   1,500,000              10.0000          EURO           19/12/2008
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   -135,012               14.0200          EURO           18/12/2009
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
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   410,000                10.5210          EURO           29/09/2008
Option            Purchased   -135,012               14.0200          EURO           18/12/2009
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
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   -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