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               17 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     300,673,382     4.81%      3,545,352     0.06%
securities
(2) Derivatives   45,713,792     0.73%     77,854,574     1.24%
(other than
options)
(3) Options and   27,613,685     0.44%     23,517,288     0.38%
agreements to
purchase/sell
Total            374,000,859     5.98%    104,917,214     1.68%


(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           3,800               10.3200 EUR
Purchase           500                 10.6100 EUR
Purchase           700                 10.6200 EUR
Purchase           14,586              10.5800 EUR
Purchase           1,071,529           10.3400 EUR
Purchase           475                 10.7200 EUR
Purchase           350                 10.0300 EUR
Purchase           3,000               9.9900 EUR
Purchase           3,269               10.6400 EUR
Purchase           58                  10.4500 EUR
Purchase           3,091               9.9921 EUR
Purchase           300,000             10.1549 EUR
Purchase           2,000               10.6100 EUR
Purchase           3,000               10.5900 EUR
Purchase           300                 10.6000 EUR
Purchase           11,984              9.9900 EUR
Purchase           14,313              9.9900 EUR
Purchase           3,777               9.9900 EUR
Purchase           400                 10.7200 EUR
Purchase           350                 10.6000 EUR
Purchase           2,000               10.1800 EUR
Purchase           219,566             10.4658 EUR
Purchase           6,017               10.1875 EUR
Purchase           15,083              10.5800 EUR
Purchase           1,178               10.7123 EUR
Purchase           3,000               10.2200 EUR
Purchase           944                 10.3300 EUR
Purchase           15,597              9.9315 EUR
Purchase           400                 10.3000 EUR
Purchase           500,000             10.6094 EUR
Purchase           2,000               10.7300 EUR
Purchase           300                 10.2000 EUR
Purchase           100                 10.5800 EUR
Purchase           498                 10.0400 EUR
Purchase           3,399               10.3011 EUR
Purchase           56                  10.3200 EUR
Purchase           13,161              10.1948 EUR
Purchase           8,324               9.9900 EUR
Purchase           250                 10.6900 EUR
Purchase           59,923              9.9900 EUR
Purchase           220,896             9.9900 EUR
Purchase           83,769              9.9900 EUR
Purchase           4,726               10.7048 EUR
Sale               7,378               10.0751 EUR
Sale               86,250              10.6285 EUR
Sale               574,416             9.9900 EUR
Sale               2,413               10.0736 EUR
Sale               3,763               9.9900 EUR
Sale               86,682              10.0757 EUR
Sale               2,723               10.0743 EUR
Sale               19,940              10.0759 EUR
Sale               250                 10.6100 EUR
Sale               3,538               10.0744 EUR
Sale               3,029               10.0744 EUR
Sale               979                 10.0715 EUR
Sale               1,249               10.0724 EUR
Sale               1,575               10.0727 EUR
Sale               3,500               10.7100 EUR
Sale               3,695               10.0747 EUR
Sale               1,160               10.0718 EUR
Sale               2,908               10.0744 EUR
Sale               1,945               Transfer
Sale               1,200               10.0500 EUR
Sale               8,000               10.5852 EUR
Sale               15,083              10.5800 EUR
Sale               5,365               10.0750 EUR
Sale               10,801              10.0754 EUR
Sale               3,000               9.9900 EUR
Sale               4,287               9.9900 EUR
Sale               20                  10.3400 EUR
Sale               4,349               10.3203 EUR
Sale               33,353              10.0758 EUR
Sale               81,209              10.0757 EUR
Sale               3,473               10.0744 EUR
Sale               276,320             10.0758 EUR
Sale               14,910              10.0760 EUR
Sale               1,011               10.0717 EUR
Sale               7,949               10.0751 EUR
Sale               7,628               10.0752 EUR
Sale               12,560              10.0759 EUR
Sale               120,798             10.0757 EUR
Sale               84,450              10.0757 EUR
Sale               21,708              9.9900 EUR
Sale               58,323              10.0758 EUR
Sale               83,524              10.0757 EUR
Sale               17,041              10.0759 EUR
Sale               11,442              10.0756 EUR
Sale               5,937               10.0750 EUR
Sale               17,196              10.0759 EUR
Sale               5,372               10.0749 EUR
Sale               7,890               9.9900 EUR
Sale               26,170              10.3163 EUR
Sale               419,118             10.3165 EUR
Sale               1,178               10.6840 EUR
Sale               1,071,529           10.3400 EUR
Sale               37,286              10.3163 EUR
Sale               14,586              10.5800 EUR
Sale               1,000               10.4400 EUR
Sale               6,067               10.0751 EUR
Sale               2,861               10.0536 EUR
Sale               204,835             10.0758 EUR
Sale               4,000               10.6800 EUR
Sale               1,566               10.0727 EUR
Sale               1,614               10.0730 EUR
Sale               410,416             10.6609 EUR
Sale               2,302               10.5109 EUR
Sale               10,290              10.0752 EUR
Sale               7,827               10.0751 EUR
Sale               44,974              10.3166 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          2302          10.5108
CFD            Long          86250         10.6284
CFD            Long          410416        10.6609
CFD            Long          1178          10.6839
CFD            Short         13161         10.1947
CFD            Short         3399          10.3011
CFD            Short         3130          10.3917
CFD            Short         1178          10.7122
CFD            Short         3091          9.992

(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                         18 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                14.0000          EURO           18/12/2009
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   215,285                9.2900           EURO           20/04/2009
Option            Purchased   250,000                10.5000          AMER           19/12/2008
Option            Purchased   410,000                10.5210          EURO           29/09/2008
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   500,000                12.0000          AMER           19/12/2008
Option            Purchased   7,500,000              0.0100           EURO           19/09/2008
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   1,000,000              11.0000          AMER           19/09/2008
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   500,000                10.5000          AMER           19/12/2008
Option            Purchased   120,000                10.5000          EURO           19/06/2009
Option            Purchased   55,000                 12.0000          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   1,000                  11.0000          EURO           19/09/2008
Option            Purchased   5,000                  14.0000          EURO           19/09/2008
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   -2,000,000             21.0000          AMER           19/12/2008
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   7,500                  12.0000          EURO           19/12/2008
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
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   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -410,000               11.9238          EURO           29/09/2008
Option            Purchased   -135,012               14.0200          EURO           18/12/2009
Option            Purchased   -135,012               14.0200          EURO           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   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   -1,000,000             12.0000          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   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   -304,461               9.1900           EURO           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               12.0000          AMER           19/12/2008
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   1,000,000              15.0000          EURO           17/12/2010
Option            Purchased   -1,000,000             14.0000          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