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               15 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     371,147,079     5.93%     4,664,948       0.07%
securities
(2) Derivatives   48,822,163     0.78%    83,189,689       1.33%
(other than
options)
(3) Options and   26,447,585     0.42%    25,626,028       0.41%
agreements to
purchase/sell
Total            446,416,827     7.14%   113,480,665       1.81%


(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      4,100                11.2400 EUR
Purchase      50                   11.0000 EUR
Purchase      900                  10.8200 EUR
Purchase      15,000,000           11.3500 EUR
Purchase      650                  11.0000 EUR
Purchase      70,328               10.9639 EUR
Purchase      450                  11.0000 EUR
Purchase      100                  10.8400 EUR
Purchase      500                  Transfer
Purchase      200                  10.9300 EUR
Purchase      210                  10.9800 EUR
Purchase      700                  10.7500 EUR
Purchase      3,000                10.8500 EUR
Purchase      100,000              10.9660 EUR
Purchase      8,431                10.9435 EUR
Purchase      30                   10.9800 EUR
Purchase      750                  10.6900 EUR
Purchase      400                  11.0000 EUR
Purchase      2,536                10.9600 EUR
Purchase      69,278               11.2400 EUR
Purchase      300                  10.8800 EUR
Purchase      250                  10.6000 EUR
Purchase      25                   10.8400 EUR
Purchase      66                   11.4100 EUR
Purchase      150                  10.8800 EUR
Purchase      117,150              10.8388 EUR
Purchase      50                   10.9700 EUR
Purchase      140                  10.6000 EUR
Purchase      2,150                11.1000 EUR
Purchase      4,100                10.8616 EUR
Purchase      50,000               10.7416 EUR
Purchase      300                  10.9000 EUR
Purchase      2,542                10.9150 EUR
Purchase      250                  10.9500 EUR
Purchase      6,711                10.9600 EUR
Purchase      13,366               10.9600 EUR
Purchase      355,471              10.9600 EUR
Purchase      1,295                10.9600 EUR
Purchase      1,486                10.9255 EUR
Purchase      2,769                10.9600 EUR
Purchase      2,225                10.7400 EUR
Purchase      50                   10.9800 EUR
Purchase      35,904               10.9600 EUR
Purchase      6,607                10.9600 EUR
Purchase      1,386                10.8200 EUR
Purchase      13,161               10.9600 EUR
Purchase      230                  10.8300 EUR
Purchase      1,000                11.0000 EUR
Purchase      110,420              10.9573 EUR
Sale          325                  Transfer
Sale          56                   11.0300 EUR
Sale          112,010              10.8276 EUR
Sale          8,431                10.9820 EUR
Sale          4,373                10.7300 EUR
Sale          30,000               8.6850
Sale          400                  Transfer
Sale          13,318               10.9600 EUR
Sale          4,100                11.2400 EUR
Sale          12,400               10.9600 EUR
Sale          291                  10.8000 EUR
Sale          355,471              10.9600 EUR
Sale          50,000               10.9984 EUR
Sale          1,000                Transfer
Sale          29,520               10.9600 EUR
Sale          724                  10.9577 EUR
Sale          19,295               10.9600 EUR
Sale          143,885              10.9600 EUR
Sale          41,992               10.9600 EUR
Sale          9,322                11.2400 EUR
Sale          78                   10.8000 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          2321          10.9288
CFD            Long          724           10.9576
CFD            Long          7026          10.9622
CFD            Long          8431          10.982
CFD            Short         117150        10.8387
CFD            Short         8431          10.9435


(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                         16 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   -192,806                9.9600          EURO           19/12/2008
Option            Purchased   -7,500,000              0.0100          EURO           19/09/2008
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   -410,000                11.9238         EURO           29/09/2008
Option            Purchased   -195,381                9.6300          EURO           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   -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   -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         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   -304,461                9.1900          EURO           19/12/2008
Option            Purchased   -750,000                14.0000         AMER           18/12/2009
Option            Purchased   -13,400                 12.7500         EURO           12/09/2008
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                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   -1,000,000              15.0000         EURO           17/12/2010
Option            Purchased   -5,000                  14.0000         EURO           19/09/2008
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   -62,159                 8.7900          EURO           19/12/2008
Option            Purchased   -5,000                  15.0000         EURO           19/09/2008
Option            Purchased   1,000,000               15.0000         EURO           17/12/2010
Option            Purchased   -2,500                  14.0000         EURO           19/12/2008
Option            Purchased   -2,500                  12.0000         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   -5,000                  9.5000          EURO           19/12/2008
Option            Purchased   500,000                 14.0000         EURO           18/12/2009
Option            Purchased   120,000                 10.5000         EURO           19/06/2009
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   -1,500,000              13.3500         EURO           23/07/2008
Option            Purchased   500,000                 10.5000         AMER           19/06/2009
Option            Purchased   7,500,000               0.0100          EURO           19/09/2008
Option            Purchased   500,000                 14.0000         EURO           18/12/2009
Option            Purchased   500,000                 14.0000         EURO           18/12/2009
Option            Purchased   500,000                 16.0000         AMER           18/09/2009
Option            Purchased   500,000                 16.0000         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   -62,159                 8.7900          EURO           19/12/2008
Option            Purchased   500,000                 10.0000         AMER           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