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 August 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     216,265,123     3.46%      2,797,878     0.04%
securities
(2) Derivatives   46,207,718     0.74%     77,614,405     1.24%
(other than
options)
(3) Options and   29,127,085     0.47%     26,030,699     0.42%
agreements to
purchase/sell
Total            291,599,926     4.66%    106,442,982     1.70%


(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      1,752                11.4000 EUR
Purchase      6,100                11.4410 EUR
Purchase      585                  Transfer
Purchase      585                  Transfer
Purchase      8,790                11.6100 EUR
Purchase      14,262               11.3100 EUR
Purchase      25,655               11.6100 EUR
Purchase      700                  11.2400 EUR
Purchase      18,550               11.3946 EUR
Purchase      5,639                11.2700 EUR
Purchase      275                  Transfer
Purchase      300                  11.3700 EUR
Purchase      300                  11.3700 EUR
Purchase      300                  11.3700 EUR
Purchase      77,657               11.3870 EUR
Purchase      553                  11.4524 EUR
Purchase      2,982                11.3124 EUR
Purchase      150,000              11.3117 EUR
Purchase      77,211               11.6100 EUR
Purchase      7,957                11.4865 EUR
Purchase      8,394                11.6100 EUR
Purchase      9,427                11.6100 EUR
Purchase      7,554                11.6100 EUR
Purchase      5,300                11.3617 EUR
Purchase      97,052               11.4365 EUR
Sale          553                  11.3476 EUR
Sale          1,283                11.4300 EUR
Sale          39,843               11.6100 EUR
Sale          29,520               11.3613 EUR
Sale          100,800              11.6100 EUR
Sale          5,400                11.3264 EUR
Sale          25,655               11.6100 EUR
Sale          5,400                11.2027 EUR
Sale          1,705                11.3100 EUR
Sale          24                   11.5100 EUR
Sale          913                  Transfer
Sale          5,639                11.2700 EUR
Sale          16,821               11.4125 EUR
Sale          200,000              11.5683 EUR
Sale          530                  11.3900 EUR
Sale          20                   11.5000 EUR
Sale          16,605               11.6100 EUR
Sale          4,227                11.3500 EUR
Sale          870                  11.3783 EUR
Sale          950                  Transfer
Sale          2,800                11.4800 EUR
Sale          300                  11.5200 EUR
Sale          1,000                11.2400 EUR
Sale          40,683               11.3100 EUR
Sale          21,668               11.5797 EUR
Sale          59,922               11.3100 EUR
Sale          773                  11.3600 EUR
Sale          146,353              11.2700 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          553           11.3476
CFD            Long          29520         11.3612
CFD            Long          7668          11.3643
CFD            Long          2800          11.48
CFD            Long          12048         11.4899
CFD            Long          300           11.52
CFD            Long          21668         11.5796
CFD            Short         2982          11.3123
CFD            Short         77657         11.3869
CFD            Short         18550         11.3946
CFD            Short         97052         11.4364
CFD            Short         6100          11.4409
CFD            Short         553           11.4524
CFD            Short         5530          11.6077

(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                         26 August 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   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   215,285                9.2900           EURO           20/04/2009
Option            Purchased   250,000                10.5000          AMER           19/12/2008
Option            Purchased   410,000                10.5210          EURO           29/09/2008
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   500,000                10.5000          AMER           19/06/2009
Option            Purchased   1,000,000              14.0000          EURO           19/12/2008
Option            Purchased   500,000                12.0000          AMER           19/12/2008
Option            Purchased   -62,159                8.7900           EURO           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                16.0000          AMER           18/09/2009
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   1,000,000              11.0000          AMER           19/09/2008
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   500,000                10.5000          AMER           19/12/2008
Option            Purchased   -192,806               9.9600           EURO           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   -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                 11.2500          EURO           12/09/2008
Option            Purchased   -195,381               9.6300           EURO           19/12/2008
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   -62,159                8.7900           EURO           19/12/2008
Option            Purchased   1,000,000              15.0000          EURO           17/12/2010
Option            Purchased   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   -2,000,000             21.0000          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             12.0000          AMER           19/12/2008
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              12.0000          EURO           18/12/2009
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
Option            Purchased   55,000                 12.0000          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   -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   -1,000,000             14.0000          AMER           19/12/2008
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   7,500,000              0.0100           EURO           19/09/2008
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   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   -5,000                 9.5000           EURO           19/12/2008
Option            Purchased   120,000                10.5000          EURO           19/06/2009
Option            Purchased   -171                   14.0000          EURO           19/09/2008
Option            Purchased   1,000                  11.0000          EURO           19/09/2008
Option            Purchased   5,000                  14.0000          EURO           19/09/2008
Option            Purchased   7,500                  12.0000          EURO           19/12/2008
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   -5,000                 15.0000          EURO           19/09/2008

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