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               11 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     222,262,061     3.55%      2,743,798     0.04%
securities
(2) Derivatives   45,731,218     0.73%     78,353,141     1.25%
(other than
options)
(3) Options and   29,127,085     0.47%     26,030,699     0.42%
agreements to
purchase/sell
Total            297,120,364     4.75%    107,127,627     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        1,100                  11.1200 EUR
Purchase        1,931                  11.2400 EUR
Purchase        5,534                  11.0827 EUR
Purchase        1,780                  11.1500 EUR
Purchase        7,184                  11.0827 EUR
Purchase        1,500                  11.0700 EUR
Purchase        200                    11.1500 EUR
Purchase        20,016                 11.6100 EUR
Purchase        27,497                 11.0986 EUR
Purchase        250                    11.0000 EUR
Purchase        7,930                  11.2400 EUR
Purchase        500                    11.0000 EUR
Purchase        100,000                11.1233 EUR
Purchase        135                    11.0000 EUR
Purchase        280                    11.0000 EUR
Purchase        210                    10.9500 EUR
Purchase        450                    11.1100 EUR
Purchase        7,800                  11.2400 EUR
Purchase        7,554                  11.1200 EUR
Purchase        555                    11.0000 EUR
Purchase        21,478                 11.1000 EUR
Purchase        883                    11.1200 EUR
Purchase        2,552                  11.1500 EUR
Purchase        883                    11.1500 EUR
Purchase        10,418                 11.1663 EUR
Purchase        2,769                  11.1200 EUR
Purchase        1,583                  11.1663 EUR
Sale            4,724                  11.0751 EUR
Sale            53,450                 11.0751 EUR
Sale            28,100                 11.0758 EUR
Sale            4,601                  11.1200 EUR
Sale            2,670                  11.0743 EUR
Sale            56,931                 11.1200 EUR
Sale            160,177                11.0999 EUR
Sale            7,800                  11.2400 EUR
Sale            6,708                  11.0751 EUR
Sale            3,486                  11.0751 EUR
Sale            7,930                  11.2400 EUR
Sale            21,270                 11.0780 EUR
Sale            24,972                 11.0780 EUR
Sale            1,931                  11.2400 EUR
Sale            59,064                 11.0780 EUR
Sale            62,310                 11.1200 EUR
Sale            550                    11.0000 EUR
Sale            12,000                 11.1469 EUR
Sale            16,000                 11.0883 EUR
Sale            100                    9.5250

(b)  Derivatives transactions (other than options)
Product name,  Long/Short    Number of     Price per
(e.g. CFD)     (Note 6)      Securities    unit (GBP)
CFD            Long          28100         11.0757
CFD            Long          160177        11.0998
CFD            Short         8832          11.0385
CFD            Short         13277         11.0591
CFD            Short         1500          11.07
CFD            Short         27497         11.0986
CFD            Short         5256          11.1178
CFD            Short         1100          11.12

(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                         12 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   500,000                14.0000          EURO           18/12/2009
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   500,000                10.5000          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   500,000                14.0000          EURO           18/12/2009
Option            Purchased   13,400                 11.2500          EURO           12/09/2008
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   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   1,000,000              14.0000          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                 12.0000          EURO           19/06/2009
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   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   215,285                9.2900           EURO           20/04/2009
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   -5,000                 15.0000          EURO           19/09/2008
Option            Purchased   -5,000                 9.5000           EURO           19/12/2008
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   -160                   14.0000          EURO           19/09/2008
Option            Purchased   7,500,000              0.0100           EURO           19/09/2008
Option            Purchased   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   -2,000,000             21.0000          AMER           19/12/2008
Option            Purchased   120,000                10.5000          EURO           19/06/2009
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              15.0000          EURO           19/06/2009
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
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   -750,000               14.0000          AMER           18/12/2009
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   -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          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   -410,000               11.9238          EURO           29/09/2008
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   10,000,000             14.5400          EURO           23/02/2010
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010

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