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               06 October 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     268,180,350     4.29%      4,673,587     0.07%
securities
(2) Derivatives   47,505,294     0.76%     65,717,394     1.05%
(other than
options)
(3) Options and   22,727,063     0.36%     19,050,128     0.30%
agreements to
purchase/sell
Total            338,412,707     5.41%     89,441,109     1.43%


(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            169                11.0200 EUR
Purchase            100                11.6900 EUR
Purchase            5,866              10.9800 EUR
Purchase            600                11.2300 EUR
Purchase            23,509             11.2265 EUR
Purchase            1,200              11.0700 EUR
Purchase            500                11.1000 EUR
Purchase            90                 11.0400 EUR
Purchase            140,000            10.9816 EUR
Purchase            2,225              11.2200 EUR
Purchase            59,071             10.9816 EUR
Purchase            280                11.1000 EUR
Purchase            300                11.0600 EUR
Purchase            1,000              11.0200 EUR
Purchase            1,926              11.3200 EUR
Purchase            163,410            11.2501 EUR
Purchase            1,100              11.6900 EUR
Purchase            43                 11.6900 EUR
Purchase            75                 11.1400 EUR
Purchase            1,100              11.0800 EUR
Purchase            23,298             11.6900 EUR
Purchase            43                 11.6900 EUR
Purchase            44,102             10.9800 EUR
Purchase            4,387              11.2155 EUR
Purchase            34,788             10.9800 EUR
Purchase            6,598              10.9800 EUR
Purchase            12,771             10.9800 EUR
Purchase            4,517              11.1898 EUR
Purchase            16,761             11.1898 EUR
Purchase            500                11.6900 EUR
Purchase            296,792            10.9800 EUR
Purchase            59,071             10.9816 EUR
Purchase            129,376            10.9800 EUR
Purchase            60,057             10.9800 EUR
Purchase            11,827             10.9800 EUR
Purchase            9                  Transfer
Purchase            12,011             10.9800 EUR
Sale                5,124              10.9800 EUR
Sale                59,071             10.9816 EUR
Sale                13,552             11.2231 EUR
Sale                20,169             11.6900 EUR
Sale                1,930              11.0200 EUR
Sale                23,298             11.6900 EUR
Sale                1,100              11.6900 EUR
Sale                110                11.0200 EUR
Sale                500                11.6900 EUR
Sale                1,200              11.1500 EUR
Sale                2,185              11.2393 EUR
Sale                64,569             10.9800 EUR
Sale                100                11.6900 EUR
Sale                100,000            11.3023 EUR
Sale                43                 11.6900 EUR
Sale                275                11.2300 EUR
Sale                450                11.0200 EUR
Sale                34,734             10.9800 EUR
Sale                300                11.0200 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          6122          10.98
CFD            Short         6588          11.1619
CFD            Short         15297         11.1621
CFD            Short         1458          11.2359

(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                         07 October 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   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             14.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             12.0000          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               14.0000          EURO           18/12/2009
Option            Purchased   -433,000               10.6692          EURO           29/12/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -55,000                12.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   -20,000                12.0000          EURO           18/12/2009
Option            Purchased   -15,000                11.0000          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   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   7,500                  12.0000          EURO           19/12/2008
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
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   -2,000,000             21.0000          AMER           19/12/2008
Option            Purchased   -1,500,000             10.0000          EURO           19/12/2008
Option            Purchased   -1,500,000             11.5000          EURO           18/12/2009
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   -304,461               9.1900           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           18/12/2009
Option            Purchased   433,000                9.4140           EURO           29/12/2008
Option            Purchased   600,000                12.5000          AMER           19/12/2008
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              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   1,500,000              11.5000          EURO           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   -135,012               14.0200          EURO           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   10,000,000             14.5400          EURO           23/02/2010
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   16,278                 14.4300          EURO           07/01/2009
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