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               22 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     356,862,341     5.71%     4,488,152       0.07%
securities
(2) Derivatives   47,935,811     0.77%    87,748,504       1.40%
(other than
options)
(3) Options and   27,447,585     0.44%    26,626,028       0.43%
agreements to
purchase/sell
Total            432,245,737     6.91%   118,862,684       1.90%

(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      390                  11.5500 EUR
Purchase      684                  11.7000 EUR
Purchase      40,046               11.5800 EUR
Purchase      69,619               11.5800 EUR
Purchase      10,786               11.5800 EUR
Purchase      59,922               11.5800 EUR
Purchase      83,891               11.5800 EUR
Purchase      8,583                11.3966 EUR
Purchase      5,400                11.4961 EUR
Purchase      310,983              11.4000 EUR
Purchase      300,000              10.8058 EUR
Purchase      78,692               11.5800 EUR
Purchase      21,000               11.4807 EUR
Purchase      1,857                11.5200 EUR
Purchase      170                  11.4100 EUR
Purchase      352                  11.3900 EUR
Purchase      251                  11.4100 EUR
Purchase      4,274                11.6426 EUR
Purchase      200                  11.4700 EUR
Purchase      90,546               12.8900 EUR
Purchase      1,100                11.7900 EUR
Purchase      16,663               11.5800 EUR
Purchase      23,678               11.5800 EUR
Purchase      35,874               11.5800 EUR
Purchase      19,340               11.5800 EUR
Purchase      20,706               11.5800 EUR
Purchase      6,902                11.5800 EUR
Purchase      16,822               11.5800 EUR
Purchase      1,009                11.5700 EUR
Purchase      167,412              11.5800 EUR
Purchase      500                  11.8300 EUR
Purchase      300                  11.4200 EUR
Purchase      526                  11.5824 EUR
Purchase      5,876                11.5800 EUR
Purchase      5,129                11.5800 EUR
Purchase      7,554                11.5800 EUR
Purchase      11,331               11.5800 EUR
Sale          200                  11.4000 EUR
Sale          309,093              11.4160 EUR
Sale          51,117               13.5400 EUR
Sale          310,983              11.5150 EUR
Sale          310,983              11.4000 EUR
Sale          4,274                11.5774 EUR
Sale          100                  Transfer
Sale          226                  11.3800 EUR
Sale          100                  Transfer
Sale          5,000                11.7200 EUR
Sale          12,374               11.5800 EUR
Sale          26,550               11.5800 EUR
Sale          8,682                11.3837 EUR
Sale          38,614               11.5800 EUR
Sale          67,408               11.5800 EUR
Sale          4,274                11.5100 EUR
Sale          2,728                11.5217 EUR
Sale          1,123                11.4500 EUR
Sale          1,136                11.4500 EUR
Sale          600                  11.3800 EUR
Sale          1,153                11.4500 EUR
Sale          684                  11.7000 EUR
Sale          138,252              11.5800 EUR
Sale          17,000,000           11.4500 EUR
Sale          50,000               11.5740 EUR
Sale          5,400                11.4215 EUR
Sale          850                  11.4700 EUR
Sale          10,802               11.7000 EUR
Sale          500                  11.4900 EUR
Sale          4,298                11.4500 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          600           11.38
CFD            Long          5400          11.4214
CFD            Long          4274          11.5773
CFD            Short         8583          11.3966
CFD            Short         21000         11.4806
CFD            Short         5400          11.4961
CFD            Short         526           11.5824
CFD            Short         4274          11.6426

(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                         23 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               12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   -1,000,000             14.0000          AMER           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             12.0000          EURO           18/12/2009
Option            Purchased   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   -500,000               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                 15.0000          EURO           19/09/2008
Option            Purchased   -5,000                 14.0000          EURO           19/09/2008
Option            Purchased   -5,000                 9.5000           EURO           19/12/2008
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             12.0000          AMER           19/12/2008
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             14.0000          EURO           19/12/2008
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   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   -2,000,000             21.0000          AMER           19/12/2008
Option            Purchased   -250,000               14.5000          AMER           19/12/2008
Option            Purchased   -2,500                 12.0000          EURO           19/12/2008
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   410,000                10.5210          EURO           29/09/2008
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   500,000                10.5000          AMER           19/06/2009
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   88,000                 12.7000          EURO           07/08/2008
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
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           17/12/2010
Option            Purchased   1,000,000              15.0000          EURO           19/06/2009
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                10.0000          AMER           19/12/2008
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               12.5000          AMER           18/12/2009
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
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               14.5000          AMER           19/12/2008
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   -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