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               12 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     220,628,625     3.53%      2,806,786     0.04%
securities
(2) Derivatives   45,710,212     0.73%     77,807,361     1.24%
(other than
options)
(3) Options and   29,113,685     0.47%     26,017,288     0.42%
agreements to
purchase/sell
Total            295,452,522     4.72%    106,631,435     1.70%


(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        14,264                 11.3400 EUR
Purchase        250                    11.1500 EUR
Purchase        2,491                  11.1000 EUR
Purchase        130                    11.3134 EUR
Purchase        52,700                 11.0338 EUR
Purchase        8,511                  11.2200 EUR
Purchase        1,797                  11.3426 EUR
Purchase        2,409,900              11.3400 EUR
Purchase        42,784                 11.1884 EUR
Purchase        45,177                 11.0901 EUR
Purchase        39,941                 11.1884 EUR
Purchase        3,525                  11.1100 EUR
Purchase        100                    11.1800 EUR
Purchase        8,310                  11.3400 EUR
Purchase        4,525                  11.1200 EUR
Purchase        48,328                 11.3400 EUR
Purchase        14,581                 11.1700 EUR
Purchase        23,501                 11.1200 EUR
Purchase        815                    11.0000 EUR
Purchase        86,130                 11.1200 EUR
Purchase        115,977                11.1200 EUR
Purchase        20,016                 11.1200 EUR
Purchase        407                    Transfer
Purchase        8,181                  11.1600 EUR
Purchase        6,431                  11.0324 EUR
Sale            1,000                  Transfer
Sale            4,525                  11.1200 EUR
Sale            1,522                  11.1787 EUR
Sale            1,797                  11.3313 EUR
Sale            14,928                 11.3400 EUR
Sale            794                    Transfer
Sale            64,220                 11.2173 EUR
Sale            2,409,900              11.3400 EUR
Sale            547,295                11.2011 EUR
Sale            20,016                 11.1200 EUR
Sale            399,968                11.3400 EUR
Sale            1,119                  11.1861 EUR
Sale            22,231                 11.3378 EUR
Sale            38,573                 11.1700 EUR
Sale            4,109                  11.3400 EUR
Sale            18,333                 11.3400 EUR
Sale            1,005,312              11.3400 EUR
Sale            35,904                 11.1200 EUR
Sale            662                    11.1830 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          66200         11.17
CFD            Long          547295        11.201
CFD            Long          64220         11.2173
CFD            Long          1797          11.3313
CFD            Short         6431          11.0323
CFD            Short         52700         11.0338
CFD            Short         45177         11.09
CFD            Short         2118          11.1167
CFD            Short         4307          11.1494
CFD            Short         42208         11.17
CFD            Short         1797          11.3425

(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                         15 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   1,000,000              15.0000          EURO           17/12/2010
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   215,285                9.2900           EURO           20/04/2009
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
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   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   250,000                10.5000          AMER           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   -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   7,500,000              0.0100           EURO           19/09/2008
Option            Purchased   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   -192,806               9.9600           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   -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   -410,000               11.9238          EURO           29/09/2008
Option            Purchased   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   -192,806               9.9600           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   -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   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
Option            Purchased   -750,000               14.0000          AMER           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               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   -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