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               10 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     222,563,763     3.56%      2,836,800     0.05%
securities
(2) Derivatives   45,744,495     0.73%     78,497,233     1.26%
(other than
options)
(3) Options and   29,127,085     0.47%     26,030,699     0.42%
agreements to
purchase/sell
Total            297,435,343     4.76%    107,364,721     1.72%


(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 Securities   Price per unit
Purchase        164,663                11.2773 EUR
Purchase        5,868                  11.2400 EUR
Purchase        1,272                  11.2617 EUR
Purchase        811                    11.2334 EUR
Purchase        1,534                  11.2517 EUR
Purchase        1,000                  11.2000 EUR
Purchase        1,421                  11.2134 EUR
Purchase        1,665                  11.1934 EUR
Purchase        27,800                 11.2935 EUR
Purchase        1,508                  11.2834 EUR
Purchase        539                    11.2834 EUR
Purchase        1,609                  11.1934 EUR
Purchase        1,641                  11.2617 EUR
Purchase        229                    11.2134 EUR
Purchase        300,000                11.2434 EUR
Purchase        3,500                  11.3600 EUR
Purchase        1,617                  11.1834 EUR
Purchase        1,341                  11.1834 EUR
Purchase        50,000                 11.2817 EUR
Purchase        370,300                11.2985 EUR
Purchase        1,477                  11.2417 EUR
Purchase        1,522                  11.2517 EUR
Purchase        1,311                  11.2834 EUR
Purchase        1,410                  11.1734 EUR
Purchase        1,637                  11.2217 EUR
Purchase        1,310                  11.2217 EUR
Purchase        310                    11.2500 EUR
Purchase        1,349                  11.2717 EUR
Purchase        9,527                  11.2695 EUR
Purchase        295                    11.1934 EUR
Purchase        1,384                  11.2734 EUR
Purchase        47,937                 11.1100 EUR
Purchase        1,005,312              11.2400 EUR
Purchase        889,256                11.2400 EUR
Purchase        721                    11.4900 EUR
Purchase        6,648                  11.6100 EUR
Purchase        249,980                11.7200 EUR
Purchase        59,995                 11.7200 EUR
Purchase        17,366                 11.6100 EUR
Purchase        500                    11.2000 EUR
Purchase        119,845                11.1100 EUR
Purchase        2,868                  11.6100 EUR
Purchase        1,373                  11.3017 EUR
Purchase        1,312                  11.2317 EUR
Purchase        1,310                  11.1934 EUR
Purchase        985                    11.2834 EUR
Purchase        1,500                  11.2834 EUR
Purchase        1,665                  11.2417 EUR
Purchase        1,598                  11.2817 EUR
Purchase        1,500                  11.3400 EUR
Purchase        1,554                  11.2934 EUR
Purchase        513                    11.2334 EUR
Purchase        1,000                  11.1700 EUR
Purchase        1,308                  11.2417 EUR
Purchase        175,000                11.2578 EUR
Sale            6,933                  11.2870 EUR
Sale            17,394                 11.2400 EUR
Sale            889,256                11.2400 EUR
Sale            25,920                 11.2724 EUR
Sale            12,567                 11.2930 EUR
Sale            39,997                 11.1100 EUR
Sale            1,700                  11.4018 EUR
Sale            67,951                 11.1100 EUR
Sale            40,000                 11.2407 EUR
Sale            2,868                  11.6100 EUR
Sale            4,322                  11.2400 EUR
Sale            23,700                 11.3803 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          34350         11.3108
CFD            Long          23700         11.3802
CFD            Long          1700          11.4017
CFD            Short         20932         11.2378
CFD            Short         164663        11.2772
CFD            Short         27800         11.2934
CFD            Short         328951        11.2938
CFD            Short         370300        11.2985

(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                         11 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   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   500,000                10.5000          AMER           19/06/2009
Option            Purchased   500,000                10.5000          AMER           19/12/2008
Option            Purchased   500,000                12.0000          AMER           19/12/2008
Option            Purchased   1,000,000              15.0000          EURO           17/12/2010
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   13,400                 11.2500          EURO           12/09/2008
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   500,000                16.0000          AMER           18/12/2009
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   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   500,000                14.0000          EURO           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   1,000                  11.0000          EURO           19/09/2008
Option            Purchased   5,000                  14.0000          EURO           19/09/2008
Option            Purchased   7,500                  12.0000          EURO           19/12/2008
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   215,285                9.2900           EURO           20/04/2009
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
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   7,500,000              0.0100           EURO           19/09/2008
Option            Purchased   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   -2,000,000             21.0000          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   -304,461               9.1900           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   -500,000               14.0000          EURO           18/12/2009
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   -13,400                12.7500          EURO           12/09/2008
Option            Purchased   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -750,000               14.0000          AMER           18/12/2009
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          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   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -750,000               14.0000          AMER           18/12/2009
Option            Purchased   -410,000               11.9238          EURO           29/09/2008
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   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010

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