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               05 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     221,036,051     3.53%      3,190,682     0.05%
securities
(2) Derivatives   46,110,956     0.74%     78,288,238     1.25%
(other than
options)
(3) Options and   29,127,085     0.47%     26,030,699     0.42%
agreements to
purchase/sell
Total            296,274,092     4.74%    107,509,619     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        302,870                11.1130 EUR
Purchase        100                    11.0800 EUR
Purchase        190,000                11.0977 EUR
Purchase        1,600                  11.1400 EUR
Purchase        1,353                  11.2034 EUR
Purchase        1,078                  11.1294 EUR
Purchase        425,870                11.0507 EUR
Purchase        12,393                 11.1541 EUR
Purchase        12,757                 11.4300 EUR
Purchase        1,400                  11.1125 EUR
Purchase        500                    11.3000 EUR
Purchase        1,643                  11.1934 EUR
Purchase        400                    11.0500 EUR
Purchase        144                    11.1300 EUR
Purchase        750                    11.1000 EUR
Purchase        2,240                  11.8300 EUR
Purchase        270                    11.1100 EUR
Purchase        107,500                11.1169 EUR
Purchase        176,408                11.1100 EUR
Purchase        250                    11.0800 EUR
Purchase        50                     11.0900 EUR
Purchase        626,524                11.1075 EUR
Purchase        2,200                  11.0900 EUR
Purchase        300                    11.0800 EUR
Purchase        500                    11.0300 EUR
Purchase        450                    11.0800 EUR
Purchase        1,504                  11.0833 EUR
Purchase        1,700                  11.0900 EUR
Sale            16,200                 11.2009 EUR
Sale            4,872                  11.2037 EUR
Sale            4,500                  11.1576 EUR
Sale            14,100                 11.7200 EUR
Sale            100                    11.3000 EUR
Sale            72,600                 11.1790 EUR
Sale            5,000                  11.1700 EUR
Sale            70,000                 11.1983 EUR
Sale            12,757                 11.4300 EUR
Sale            4,302                  11.4300 EUR
Sale            1,400                  11.1275 EUR
Sale            5,961                  11.1301 EUR
Sale            106,533                11.1100 EUR
Sale            400                    8.9200
Sale            3,053                  11.1100 EUR
Sale            15,467                 11.0764 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          50682         11.1071
CFD            Long          5215          11.1123
CFD            Long          5393          11.1214
CFD            Long          1400          11.1274
CFD            Long          3747          11.1781
CFD            Long          72600         11.179
CFD            Long          16200         11.2009
CFD            Short         626524        11.1075
CFD            Short         1400          11.1125
CFD            Short         107500        11.1168
CFD            Short         63826         11.1338
CFD            Short         12393         11.154

(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                         08 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          AMER           19/12/2008
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          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   -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          AMER           19/12/2008
Option            Purchased   5,000                  14.0000          EURO           19/09/2008
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
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           19/06/2009
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                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