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               09 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     267,865,511     4.28%      4,401,213     0.07%
securities
(2) Derivatives   47,793,351     0.76%     66,101,918     1.06%
(other than
options)
(3) Options and   22,727,063     0.36%     19,050,128     0.30%
agreements to
purchase/sell
Total            338,385,925     5.41%     89,553,259     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            1,050              10.2000 EUR
Purchase            953                10.5000 EUR
Purchase            200                10.4500 EUR
Purchase            1,815              10.7608 EUR
Purchase            675                10.7700 EUR
Purchase            400,000            10.3060 EUR
Purchase            4,419              10.7816 EUR
Purchase            1,702              10.6500 EUR
Purchase            1,102              10.6500 EUR
Purchase            5,000              10.7600 EUR
Purchase            51,961             10.6500 EUR
Purchase            750                10.6300 EUR
Purchase            2,000              10.3600 EUR
Purchase            40                 10.1500 EUR
Purchase            175                10.7600 EUR
Purchase            25,185             10.7400 EUR
Purchase            200                10.9900 EUR
Purchase            1,400              10.4400 EUR
Purchase            30,000             10.8000 EUR
Purchase            2,000              10.8000 EUR
Purchase            570                10.4000 EUR
Purchase            500                10.6400 EUR
Purchase            150                10.3000 EUR
Purchase            3,000              10.6876 EUR
Purchase            150                10.7500 EUR
Purchase            19,815             10.7200 EUR
Purchase            2,700              10.8400 EUR
Purchase            1,000              10.5700 EUR
Purchase            3,000              10.8500 EUR
Purchase            2,200              10.8900 EUR
Purchase            6,759              10.3000 EUR
Purchase            1,572              10.7608 EUR
Purchase            3,503              10.7608 EUR
Purchase            71,678             10.8600 EUR
Purchase            3,285              10.7608 EUR
Purchase            23,978             10.3000 EUR
Purchase            13,440             10.3000 EUR
Purchase            4,398              10.8572 EUR
Purchase            2,093              10.7608 EUR
Purchase            56,863             10.3000 EUR
Purchase            34,734             10.3000 EUR
Purchase            1,500              10.3000 EUR
Purchase            2,000              10.7000 EUR
Purchase            289                10.3000 EUR
Purchase            4,550              10.6100 EUR
Purchase            2,825              10.6500 EUR
Purchase            4,700              10.6800 EUR
Purchase            469                10.8600 EUR
Purchase            100,000            10.9116 EUR
Purchase            215                10.8600 EUR
Purchase            20,000             10.7900 EUR
Purchase            57,448             10.3000 EUR
Sale                51,961             10.6500 EUR
Sale                225                10.8400 EUR
Sale                23,978             10.3000 EUR
Sale                939                10.8757 EUR
Sale                1,702              10.6500 EUR
Sale                13,100             10.8836 EUR
Sale                13,100             10.8836 EUR
Sale                12,200             10.3300 EUR
Sale                172                10.9000 EUR
Sale                1,102              10.6500 EUR
Sale                2,000              11.0800 EUR
Sale                12,641             10.3000 EUR
Sale                13,800             10.3700 EUR
Sale                583,192            10.3000 EUR
Sale                4,105              10.3000 EUR
Sale                4,700              11.1800 EUR
Sale                540                Transfer
Sale                906                10.2700 EUR

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Short         50425         10.8798

(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                         10 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           19/06/2009
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          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   -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           17/12/2010
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          EURO           18/12/2009
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           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   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