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               29 August 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     216,916,523     3.47%      3,060,303     0.05%
securities
(2) Derivatives  46,207,236      0.74%     78,212,856     1.25%
(other than
options)
(3) Options and   29,127,085     0.47%     26,030,699     0.42%
agreements to
purchase/sell
Total            292,250,844     4.67%    107,303,858     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        1,388                  11.6417 EUR
Purchase        396                    11.6400 EUR
Purchase        11,097                 11.6384 EUR
Purchase        30                     11.6366 EUR
Purchase        21,561                 11.6400 EUR
Purchase        21,762                 11.6384 EUR
Purchase        6,287                  11.6400 EUR
Purchase        42,885                 11.6400 EUR
Purchase        3,840                  11.6366 EUR
Purchase        19,129                 11.6400 EUR
Purchase        23,793                 11.6400 EUR
Purchase        129,452                11.6400 EUR
Purchase        15,568                 11.6000 EUR
Purchase        4,094                  11.6366 EUR
Purchase        602                    11.6400 EUR
Purchase        176                    11.6384 EUR
Purchase        1,958                  11.6366 EUR
Purchase        25,072                 11.6400 EUR
Purchase        21,707                 11.6400 EUR
Purchase        1,695                  11.6366 EUR
Purchase        9,608                  11.6384 EUR
Purchase        1,749                  11.6384 EUR
Purchase        308                    11.6366 EUR
Purchase        74,293                 11.6400 EUR
Purchase        17,837                 11.6400 EUR
Purchase        47,938                 11.6400 EUR
Purchase        10,400                 11.6123 EUR
Purchase        600                    11.6500 EUR
Purchase        59,239                 11.6400 EUR
Purchase        46,150                 11.6400 EUR
Purchase        1,388                  11.6000 EUR
Purchase        46,150                 11.6389 EUR
Purchase        439,862                11.6389 EUR
Purchase        50                     11.6400 EUR
Purchase        150                    11.6100 EUR
Purchase        6,028                  11.6400 EUR
Purchase        52,431                 11.6400 EUR
Purchase        472,220                11.6400 EUR
Purchase        95,310                 11.6417 EUR
Purchase        8,803                  11.6400 EUR
Purchase        14,164                 11.6400 EUR
Purchase        3,610                  11.6400 EUR
Purchase        2,691                  11.6400 EUR
Purchase        4,300                  11.6116 EUR
Purchase        7,000                  11.5400 EUR
Purchase        23,205                 11.6384 EUR
Purchase        33,054                 11.5849 EUR
Sale            333                    11.5983 EUR
Sale            1,194                  11.6083 EUR
Sale            41,400                 11.6457 EUR
Sale            4,202                  11.6083 EUR
Sale            2,221                  11.6183 EUR
Sale            1,203                  11.6083 EUR
Sale            1,388                  11.6000 EUR
Sale            126                    11.6083 EUR
Sale            1,961                  11.6083 EUR
Sale            1,434                  11.6183 EUR
Sale            1,930                  11.6083 EUR
Sale            1,048                  11.6083 EUR
Sale            187,452                11.5996 EUR
Sale            152                    11.6083 EUR
Sale            7,091                  11.6083 EUR
Sale            2,210                  11.6376 EUR
Sale            102                    11.6083 EUR
Sale            5,700                  11.6389 EUR
Sale            24,097                 11.6400 EUR
Sale            37,325                 11.6400 EUR
Sale            8,803                  11.6400 EUR
Sale            344                    11.6400 EUR
Sale            42,885                 11.6400 EUR
Sale            47,496                 11.5783 EUR
Sale            25,072                 11.6400 EUR
Sale            52,431                 11.6400 EUR
Sale            21,707                 11.6400 EUR
Sale            396                    11.6400 EUR
Sale            46,150                 11.6400 EUR
Sale            472,220                11.6400 EUR
Sale            6,287                  11.6400 EUR
Sale            23,511                 11.6361 EUR
Sale            2,377                  11.6400 EUR
Sale            31,766                 11.6383 EUR
Sale            24,097                 11.6400 EUR
Sale            74,293                 11.6400 EUR
Sale            24,983                 11.6400 EUR
Sale            8,588                  11.6400 EUR
Sale            5,174                  11.6400 EUR
Sale            74,496                 11.6400 EUR
Sale            133,231                11.6416 EUR
Sale            833                    11.6083 EUR
Sale            600                    8.9800
Sale            14,136                 11.6400 EUR
Sale            15,568                 11.6000 EUR
Sale            8,558                  11.6183 EUR
Sale            999                    11.6083 EUR
Sale            2,974                  11.6400 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          22429         11.6215
CFD            Long          2210          11.6375
CFD            Long          5700          11.6389
CFD            Long          41400         11.6457
CFD            Short         4300          11.6116
CFD            Short         10400         11.6123

(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                         01 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               12.0000          AMER           19/12/2008
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   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
Option            Purchased   -750,000               14.0000          AMER           18/12/2009
Option            Purchased   -304,461               9.1900           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   -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   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   -410,000               11.9238          EURO           29/09/2008
Option            Purchased   -55,000                12.0000          EURO           19/12/2008
Option            Purchased   -750,000               14.0000          AMER           18/12/2009
Option            Purchased   7,500                  12.0000          EURO           19/12/2008
Option            Purchased   -20,000                12.0000          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                 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   -171                   14.0000          EURO           19/09/2008
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   5,000                  14.0000          EURO           19/09/2008
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
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   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   -2,000,000             21.0000          AMER           19/12/2008
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   1,000                  11.0000          EURO           19/09/2008
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   500,000                10.5000          AMER           19/12/2008
Option            Purchased   500,000                10.5000          AMER           19/06/2009
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   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   215,285                9.2900           EURO           20/04/2009
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   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   1,000,000              15.0000          EURO           17/12/2010
Option            Purchased   7,500,000              0.0100           EURO           19/09/2008
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   -114,995               10.0100          EURO           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   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   410,000                10.5210          EURO           29/09/2008
Option            Purchased   -135,012               14.0200          EURO           18/12/2009
Option            Purchased   250,000                10.5000          AMER           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   13,400                 11.2500          EURO           12/09/2008
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
Option            Purchased   -135,012               14.0200          EURO           18/12/2009

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