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               23 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     355,640,049     5.69%     4,872,847       0.08%
securities
(2) Derivatives   48,136,506     0.77%    87,725,771       1.40%
(other than
options)
(3) Options and   25,947,585     0.41%    25,126,028       0.40%
agreements to
purchase/sell
Total            429,724,140    6.87%    117,724,646       1.88%

(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      40                   11.8300 EUR
Purchase      10,588               11.5800 EUR
Purchase      125                  12.0100 EUR
Purchase      100                  11.8500 EUR
Purchase      111,000              12.2206 EUR
Purchase      19,284               11.5800 EUR
Purchase      251                  11.4100 EUR
Purchase      107,623              11.8620 EUR
Purchase      3,500                12.2227 EUR
Purchase      39                   12.0000 EUR
Purchase      1,361                12.0300 EUR
Purchase      23,678               11.5800 EUR
Purchase      250,000              12.0856 EUR
Purchase      200                  11.8000 EUR
Purchase      766                  12.1040 EUR
Purchase      682                  11.8300 EUR
Purchase      8,814                12.2200 EUR
Purchase      16,228               11.9878 EUR
Purchase      9,431                11.8300 EUR
Purchase      1,396                11.8300 EUR
Purchase      944                  11.8300 EUR
Purchase      7,554                12.2200 EUR
Purchase      23,198               12.2200 EUR
Sale          35                   12.0000 EUR
Sale          137                  11.8000 EUR
Sale          250,000              12.2182 EUR
Sale          35                   12.0000 EUR
Sale          550                  11.9900 EUR
Sale          12,374               11.5800 EUR
Sale          73,000               12.2140 EUR
Sale          3,312                12.2174 EUR
Sale          35                   12.0000 EUR
Sale          206,719              12.1456 EUR
Sale          25                   Transfer
Sale          174,745              11.5300 EUR
Sale          175                  12.0000 EUR
Sale          250                  11.9800 EUR
Sale          111,000              12.2200 EUR
Sale          400                  11.9900 EUR
Sale          101,306              11.9632 EUR
Sale          94,282               12.2200 EUR
Sale          181,998              12.2200 EUR
Sale          10,712               12.2200 EUR
Sale          500                  Transfer
Sale          500                  11.9500 EUR
Sale          35                   12.0000 EUR
Sale          500                  12.2500 EUR
Sale          35                   12.0000 EUR
Sale          3,500                12.2312 EUR
Sale          31,238               11.4800 EUR
Sale          15,524               12.1133 EUR
Sale          19,284               11.5800 EUR
Sale          10,588               11.5800 EUR
Sale          105,000              11.5000 EUR
Sale          111,000              12.2194 EUR
Sale          300                  11.9800 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          19284         11.58
CFD            Long          15524         12.1132
CFD            Long          206719        12.1456
CFD            Long          3312          12.2174
CFD            Long          3500          12.2312
CFD            Short         19284         11.58
CFD            Short         1361          12.03
CFD            Short         766           12.1039
CFD            Short         3500          12.2227

(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                         24 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              15.0000          EURO           17/12/2010
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   -62,159                8.7900           EURO           19/12/2008
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   -62,159                8.7900           EURO           19/12/2008
Option            Purchased   500,000                10.5000          AMER           19/06/2009
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   -410,000               11.9238          EURO           29/09/2008
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
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   -13,400                12.7500          EURO           12/09/2008
Option            Purchased   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   1,000,000              12.0000          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   -88,000                14.4770          EURO           07/08/2008
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              14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   -1,000,000             14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             14.0000          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   -2,000,000             21.0000          AMER           19/12/2008
Option            Purchased   -750,000               14.0000          AMER           18/12/2009
Option            Purchased   -7,500,000             0.0100           EURO           19/09/2008
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   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
Option            Purchased   -2,500                 12.0000          EURO           19/12/2008
Option            Purchased   7,500,000              0.0100           EURO           19/09/2008
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
Option            Purchased   -20,000                12.0000          EURO           18/12/2009
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   -5,000                 15.0000          EURO           19/09/2008
Option            Purchased   -5,000                 14.0000          EURO           19/09/2008
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   -500,000               12.0000          AMER           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   55,000                 12.0000          EURO           19/12/2008
Option            Purchased   120,000                10.5000          EURO           19/06/2009
Option            Purchased   -5,000                 9.5000           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