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               18 July 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     358,056,678     5.72%     4,631,887       0.07%
securities
(2) Derivatives   47,128,834     0.75%    82,811,951       1.32%
(other than
options)
(3) Options and   26,447,585     0.42%    25,626,028       0.41%
agreements to
purchase/sell
Total            432,633,097     6.92%   114,069,866       1.82%

(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      5,000                11.3000 EUR
Purchase      1,500                11.3000 EUR
Purchase      8,527                11.3024 EUR
Purchase      499,098              11.5206 EUR
Purchase      6,000                11.3000 EUR
Purchase      791,163              11.3900 EUR
Purchase      3,000                11.3000 EUR
Purchase      3,000                11.3000 EUR
Purchase      2,600                11.6500 EUR
Purchase      16,500,000           11.3900 EUR
Purchase      1,400                11.7526 EUR
Purchase      477                  11.7525 EUR
Purchase      1,000                11.2900 EUR
Purchase      14,508               11.3300 EUR
Purchase      500                  11.4000 EUR
Purchase      2,000                11.3600 EUR
Purchase      2,630                11.3900 EUR
Purchase      7,000                11.2700 EUR
Purchase      380                  11.3400 EUR
Purchase      26,242               11.5353 EUR
Purchase      1,000                11.3000 EUR
Purchase      5,000                11.3000 EUR
Purchase      4,000                11.3000 EUR
Purchase      3,500                11.3000 EUR
Purchase      3,000                11.3000 EUR
Purchase      3,000                11.3000 EUR
Purchase      6,000                11.3600 EUR
Purchase      8,000                11.3000 EUR
Purchase      2,000                11.3600 EUR
Purchase      50,000               11.4115 EUR
Purchase      3,405                11.4000 EUR
Purchase      3,000                11.3000 EUR
Purchase      19,923               11.7500 EUR
Purchase      69,618               11.7500 EUR
Purchase      44,102               11.7500 EUR
Purchase      96,043               11.7500 EUR
Purchase      3,000                11.3000 EUR
Purchase      34,977               11.4600 EUR
Purchase      60                   Transfer
Purchase      3,000                11.2900 EUR
Purchase      13,173               11.7500 EUR
Purchase      5,874                11.7500 EUR
Purchase      4,000                11.3000 EUR
Sale          21,890               11.7500 EUR
Sale          748                  11.5200 EUR
Sale          1,400                Transfer
Sale          10,000               11.6100 EUR
Sale          81                   11.5600 EUR
Sale          650                  11.7900 EUR
Sale          13,800               11.3512 EUR
Sale          670,000              11.7500 EUR
Sale          46,508               11.7500 EUR
Sale          8,682                11.6208 EUR
Sale          327                  11.3000 EUR
Sale          3,339                11.3900 EUR
Sale          8,583                11.7272 EUR
Sale          210                  11.6700 EUR
Sale          1,576                11.5000 EUR
Sale          120                  11.5000 EUR
Sale          470,000              11.7500 EUR
Sale          800,000              11.7500 EUR
Sale          10,000,000           11.7500 EUR
Sale          400,000              11.7500 EUR
Sale          30,801               11.7500 EUR
Sale          10,823               11.3900 EUR
Sale          1,400                11.7774 EUR
Sale          16,385               11.3512 EUR
Sale          1,386                11.4200 EUR
Sale          17,000,000           11.4500 EUR
Sale          2,000,000            11.7500 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          8583          11.7271
CFD            Long          1400          11.7773
CFD            Short         16498         11.2758
CFD            Short         8527          11.3023
CFD            Short         499098        11.5206
CFD            Short         26242         11.5352
CFD            Short         20138         11.7477
CFD            Short         477           11.7524
CFD            Short         1400          11.7526

(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                         21 July 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   -13,400               12.7500           EURO           12/09/2008
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   -88,000               14.4770           EURO           07/08/2008
Option            Purchased   -750,000              14.0000           AMER           18/12/2009
Option            Purchased   -62,159               8.7900            EURO           19/12/2008
Option            Purchased   -195,381              9.6300            EURO           19/12/2008
Option            Purchased   13,400                11.2500           EURO           12/09/2008
Option            Purchased   19,900                13.0400           EURO           03/10/2008
Option            Purchased   88,000                12.7000           EURO           07/08/2008
Option            Purchased   215,285               9.2900            EURO           20/04/2009
Option            Purchased   410,000               10.5210           EURO           29/09/2008
Option            Purchased   500,000               10.0000           AMER           19/12/2008
Option            Purchased   -62,159               8.7900            EURO           19/12/2008
Option            Purchased   -410,000              11.9238           EURO           29/09/2008
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   -192,806              9.9600            EURO           19/12/2008
Option            Purchased   -500,000              14.0000           EURO           18/12/2009
Option            Purchased   -195,381              9.6300            EURO           19/12/2008
Option            Purchased   -304,461              9.1900            EURO           19/12/2008
Option            Purchased   -304,461              9.1900            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   500,000               14.0000           EURO           18/12/2009
Option            Purchased   -500,000              14.0000           EURO           18/12/2009
Option            Purchased   -7,500,000            0.0100            EURO           19/09/2008
Option            Purchased   500,000               10.5000           AMER           19/06/2009
Option            Purchased   -2,500                12.0000           EURO           19/12/2008
Option            Purchased   -2,500                14.0000           EURO           19/12/2008
Option            Purchased   1,000                 11.0000           EURO           19/09/2008
Option            Purchased   5,000                 14.0000           EURO           19/09/2008
Option            Purchased   20,000                12.0000           EURO           18/12/2009
Option            Purchased   -5,000                15.0000           EURO           19/09/2008
Option            Purchased   120,000               10.5000           EURO           19/06/2009
Option            Purchased   -5,000                14.0000           EURO           19/09/2008
Option            Purchased   -2,000,000            21.0000           AMER           19/12/2008
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           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   55,000                12.0000           EURO           19/12/2008
Option            Purchased   7,500,000             0.0100            EURO           19/09/2008
Option            Purchased   -1,000,000            15.0000           EURO           17/12/2010
Option            Purchased   500,000               14.0000           EURO           18/12/2009
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             12.0000           EURO           18/12/2009
Option            Purchased   1,000,000             14.0000           EURO           19/12/2008
Option            Purchased   -5,000                9.5000            EURO           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   -1,500,000            13.3500           EURO           23/07/2008
Option            Purchased   1,500,000             13.3500           EURO           23/07/2008
Option            Purchased   10,000,000            14.5400           EURO           23/02/2010
Option            Purchased   -55,000               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   1,000,000             15.0000           EURO           19/06/2009

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