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               09 September 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     220,146,975     3.52%      3,251,418     0.05%
securities
(2) Derivatives   46,094,175     0.74%     77,697,613     1.24%
(other than
options)
(3) Options and   29,127,085     0.47%     26,030,699     0.42%
agreements to
purchase/sell
Total            295,368,235     4.72%    106,979,719     1.71%


(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        12,255                 11.6317 EUR
Purchase        19,929                 11.7200 EUR
Purchase        66,997                 11.6317 EUR
Purchase        4,168                  11.7918 EUR
Purchase        9,367                  11.7918 EUR
Purchase        23,501                 11.3300 EUR
Purchase        1,100                  11.7700 EUR
Purchase        11,834                 11.7472 EUR
Purchase        30,025                 11.6100 EUR
Purchase        13,649                 11.7736 EUR
Purchase        30,500                 11.6099 EUR
Purchase        24,605                 11.7200 EUR
Purchase        5,127                  11.8198 EUR
Purchase        680,764                11.6008 EUR
Purchase        419,369                11.6091 EUR
Purchase        41,424                 11.7200 EUR
Purchase        41,430                 11.6100 EUR
Purchase        2,161                  11.3000 EUR
Purchase        5,232                  11.3000 EUR
Purchase        100,000                11.6135 EUR
Purchase        20,712                 11.7200 EUR
Purchase        3,000                  11.7200 EUR
Purchase        143,616                11.7200 EUR
Sale            119,844                11.7797 EUR
Sale            3,900                  Transfer
Sale            160,414                11.7830 EUR
Sale            18,534                 11.7788 EUR
Sale            3,000                  11.7200 EUR
Sale            500                    11.7600 EUR
Sale            621                    11.5779 EUR
Sale            15                     11.6600 EUR
Sale            24,605                 11.7200 EUR
Sale            3,200                  11.6583 EUR
Sale            2,031                  11.6100 EUR
Sale            28,334                 11.7865 EUR
Sale            15,890                 11.8071 EUR
Sale            19,685                 11.7200 EUR
Sale            1,251                  11.8500 EUR
Sale            142,740                11.7725 EUR
Sale            11,431                 11.7554 EUR
Sale            6,896                  11.7725 EUR
Sale            2,873                  11.7554 EUR
Sale            23,379                 11.7640 EUR
Sale            5,709                  11.7725 EUR
Sale            19,929                 11.7200 EUR
Sale            167,380                11.7865 EUR
Sale            232,831                11.7865 EUR
Sale            138,769                11.7865 EUR
Sale            74,956                 11.7200 EUR
Sale            1,271                  11.7691 EUR
Sale            240                    11.8000 EUR
Sale            200                    11.7500 EUR
Sale            16,986                 11.7725 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          4794          11.6197
CFD            Long          4324          11.7474
CFD            Long          5697          11.7688
CFD            Long          18534         11.7788
CFD            Long          160414        11.7829
CFD            Long          26324         11.7961
CFD            Short         419369        11.609
CFD            Short         30500         11.6099
CFD            Short         11834         11.7471
CFD            Short         13649         11.7736
CFD            Short         35445         11.7768
CFD            Short         18151         11.788

(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                         10 September 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   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                14.0000          EURO           18/12/2009
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   500,000                10.0000          AMER           19/12/2008
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   -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          EURO           18/12/2009
Option            Purchased   5,000                  14.0000          EURO           19/09/2008
Option            Purchased   1,000,000              11.0000          AMER           19/09/2008
Option            Purchased   7,500,000              0.0100           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   120,000                10.5000          EURO           19/06/2009
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   -5,000                 15.0000          EURO           19/09/2008
Option            Purchased   -5,000                 9.5000           EURO           19/12/2008
Option            Purchased   500,000                10.5000          AMER           19/06/2009
Option            Purchased   -160                   14.0000          EURO           19/09/2008
Option            Purchased   500,000                10.5000          AMER           19/12/2008
Option            Purchased   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   13,400                 11.2500          EURO           12/09/2008
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   -1,000,000             14.0000          AMER           19/12/2008
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   -192,806               9.9600           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   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   1,000                  11.0000          EURO           19/09/2008
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   -62,159                8.7900           EURO           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   -500,000               14.0000          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   -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   -304,461               9.1900           EURO           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   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   55,000                 12.0000          EURO           19/12/2008
Option            Purchased   -55,000                12.0000          EURO           19/12/2008
Option            Purchased   -20,000                12.0000          EURO           18/12/2009
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
Option            Purchased   -500,000               12.0000          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