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               25 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     275,411,295     4.40%      2,984,897     0.05%
securities
(2) Derivatives   45,707,748     0.73%     66,112,025     1.06%
(other than
options)
(3) Options and   21,467,685     0.34%     17,787,128     0.28%
agreements to
purchase/sell
Total            342,586,728     5.48%     86,884,050     1.39%


(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            38,208             10.6816 EUR
Purchase            57                 10.6100 EUR
Purchase            10,984             10.9100 EUR
Purchase            273                Transfer
Purchase            500                10.5700 EUR
Purchase            1,000              10.5900 EUR
Purchase            175                10.6900 EUR
Purchase            3,387              10.9075 EUR
Purchase            1,000              10.7000 EUR
Purchase            270                10.6600 EUR
Purchase            2,770              10.5400 EUR
Purchase            68                 10.7376 EUR
Purchase            284                10.5600 EUR
Purchase            119,950            10.9100 EUR
Purchase            465                10.7300 EUR
Purchase            1,604              Transfer
Purchase            2,250              10.7400 EUR
Purchase            41,677             10.9100 EUR
Purchase            150                10.7600 EUR
Purchase            10,000             10.6800 EUR
Purchase            2,029              10.9100 EUR
Purchase            96,388             10.7183 EUR
Sale                69,468             10.9100 EUR
Sale                43,416             10.9100 EUR
Sale                79,615             10.9100 EUR
Sale                24,410             10.9100 EUR
Sale                10,134             10.8123 EUR
Sale                43,170             10.8123 EUR
Sale                16,295             10.8123 EUR
Sale                35,921             10.9100 EUR
Sale                120,112            10.9100 EUR
Sale                118,706            10.8746 EUR
Sale                100,000            10.9075 EUR
Sale                3,455              10.9042 EUR
Sale                360,338            10.9097 EUR
Sale                15,818             10.8123 EUR
Sale                3,387              10.9075 EUR
Sale                600,563            10.5997 EUR
Sale                68                 10.7376 EUR
Sale                192,000            10.8000 EUR
Sale                2,770              10.5400 EUR
Sale                59,909             10.6599 EUR
Sale                39,290             10.6599 EUR
Sale                92,593             10.6599 EUR
Sale                5,801              10.6599 EUR
Sale                18,032             10.6599 EUR
Sale                3,796              10.6412 EUR
Sale                24,364             10.9348 EUR
Sale                258,531            10.8123 EUR
Sale                69,712             10.9100 EUR
Sale                11,207             10.6599 EUR
Sale                12,824             10.8123 EUR
Sale                23,012             10.6599 EUR
Sale                19,653             10.6599 EUR
Sale                29,243             10.6599 EUR
Sale                37,307             10.6599 EUR
Sale                16,552             10.6599 EUR
Sale                36,730             10.6599 EUR
Sale                31,080             10.6599 EUR
Sale                4,131              10.8189 EUR
Sale                3,595              10.6599 EUR
Sale                7,410              10.8123 EUR
Sale                4,878              10.8123 EUR
Sale                7,197              10.8123 EUR
Sale                5,548              10.8123 EUR
Sale                10,622             10.8123 EUR
Sale                24,084             10.8123 EUR
Sale                92,824             10.5809 EUR
Sale                13,783             10.8123 EUR
Sale                4,379              10.6599 EUR
Sale                2,746              10.8123 EUR
Sale                18,999             10.8123 EUR
Sale                5,163              10.8123 EUR
Sale                30,149             10.8123 EUR
Sale                25,137             10.8123 EUR
Sale                32,761             10.8123 EUR
Sale                77,955             10.8123 EUR
Sale                7,290              10.8123 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          118706        10.8746
CFD            Short         54900         10.9315

(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                         26 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   -1,500,000             10.0000          EURO           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   500,000                16.0000          AMER           18/09/2009
Option            Purchased   410,000                10.5210          EURO           29/09/2008
Option            Purchased   600,000                12.5000          AMER           19/12/2008
Option            Purchased   260,000                9.7500           EURO           19/12/2008
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   1,500,000              10.0000          EURO           19/12/2008
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   -5,000                 12.0000          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   7,500                  12.0000          EURO           19/12/2008
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   -15,000                11.0000          EURO           18/12/2009
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
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   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   215,285                9.2900           EURO           20/04/2009
Option            Purchased   250,000                10.5000          AMER           19/12/2008
Option            Purchased   120,000                10.5000          EURO           19/06/2009
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -2,000,000             21.0000          AMER           19/12/2008
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   -260,000               10.5000          EURO           19/12/2008
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
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   -500,000               12.0000          AMER           19/12/2008
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             14.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             14.0000          EURO           19/12/2008
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
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   -410,000               11.9238          EURO           29/09/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009

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