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               17 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     371,313,687     5.94%     5,139,374       0.08%
securities
(2) Derivatives   48,646,321     0.78%    83,767,041       1.34%
(other than
options)
(3) Options and   26,447,585     0.42%    25,626,028       0.41%
agreements to
purchase/sell
Total            446,407,593     7.14%   114,532,443       1.83%


(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      210,383              11.3900 EUR
Purchase      1,500                11.1600 EUR
Purchase      100                  11.2800 EUR
Purchase      7,030                11.3900 EUR
Purchase      204                  Transfer
Purchase      1,000                11.2800 EUR
Purchase      24,930               11.0600 EUR
Purchase      425                  11.3300 EUR
Purchase      200                  11.3500 EUR
Purchase      1,665                11.0600 EUR
Purchase      2,100                11.3926 EUR
Purchase      30,054               11.3900 EUR
Purchase      369,816              11.4208 EUR
Purchase      4,624                11.2751 EUR
Purchase      736                  Transfer
Purchase      100                  11.4000 EUR
Purchase      2,936                11.3900 EUR
Purchase      2,033,710            11.3900 EUR
Purchase      818                  11.3900 EUR
Purchase      27,380               11.3900 EUR
Purchase      7,633                11.2751 EUR
Purchase      2,769                11.3900 EUR
Purchase      1,700                11.3300 EUR
Purchase      850                  11.3900 EUR
Purchase      200                  11.3500 EUR
Purchase      8,527                11.4404 EUR
Sale          2,100                11.4474 EUR
Sale          1,700                11.3900 EUR
Sale          288                  11.3000 EUR
Sale          300,000              10.8058 EUR
Sale          172                  11.4400 EUR
Sale          1,450                11.2800 EUR
Sale          11,149               11.0600 EUR
Sale          266                  11.4000 EUR
Sale          120,000              11.3883 EUR
Sale          905                  11.3900 EUR
Sale          2,713                11.3800 EUR
Sale          1,760                8.9100
Sale          162,345              11.3900 EUR
Sale          1,583                11.2637 EUR
Sale          172,184              11.3900 EUR
Sale          500                  11.2900 EUR
Sale          352,816              11.3900 EUR
Sale          264,208              11.4246 EUR
Sale          10,823               11.3900 EUR
Sale          1,665                11.0600 EUR
Sale          2,550                11.2800 EUR
Sale          1,000,000            11.3897 EUR
Sale          150                  11.4600 EUR
Sale          280                  11.4000 EUR
Sale          500                  11.3000 EUR
Sale          6,845                11.2637 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          2100          11.4474
CFD            Short         90699         11.3542
CFD            Short         329174        11.3878
CFD            Short         2100          11.3925
CFD            Short         369816        11.4208
CFD            Short         8527          11.4404

(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                         18 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   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   -1,000,000             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   -750,000               14.0000          AMER           18/12/2009
Option            Purchased   -750,000               14.0000          AMER           18/12/2009
Option            Purchased   -55,000                12.0000          EURO           19/12/2008
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
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   -410,000               11.9238          EURO           29/09/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   1,000                  11.0000          EURO           19/09/2008
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                 14.0000          EURO           19/09/2008
Option            Purchased   -5,000                 15.0000          EURO           19/09/2008
Option            Purchased   -5,000                 9.5000           EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   5,000                  14.0000          EURO           19/09/2008
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   -2,500                 12.0000          EURO           19/12/2008
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   410,000                10.5210          EURO           29/09/2008
Option            Purchased   500,000                16.0000          AMER           18/09/2009
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   88,000                 12.7000          EURO           07/08/2008
Option            Purchased   500,000                10.5000          AMER           19/06/2009
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   1,000,00               15.0000          EURO           17/12/2010
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   1,000,000              14.0000          EURO           19/12/2008
Option            Purchased   7,500,000              0.0100           EURO           19/09/2008
Option            Purchased   -1,500,000             13.3500          EURO           23/07/2008
Option            Purchased   1,500,000              13.3500          EURO           23/07/2008
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   -135,012               14.0200          EURO           18/12/2009
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
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   215,285                9.2900           EURO           20/04/2009
Option            Purchased   -135,012               14.0200          EURO           18/12/2009
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   -114,995               10.0100          EURO           19/12/2008
Option            Purchased   -88,000                14.4770          EURO           07/08/2008
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   -192,806               9.9600           EURO           19/12/2008

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