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               08 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     219,707,125     3.51%      3,251,418     0.05%
securities
(2) Derivatives   46,081,208     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            294,915,418     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        1,399                  11.6935 EUR
Purchase        6,600                  11.7076 EUR
Purchase        1,225                  11.7618 EUR
Purchase        1,329                  11.7035 EUR
Purchase        53,400                 11.6843 EUR
Purchase        1,457                  11.7435 EUR
Purchase        1,100                  14.0000 EUR
Purchase        1,254                  11.7818 EUR
Purchase        40                     11.7618 EUR
Purchase        1,404                  11.8318 EUR
Purchase        1,100                  14.0000 EUR
Purchase        6,171                  11.1100 EUR
Purchase        101                    11.8618 EUR
Purchase        1,223                  11.7718 EUR
Purchase        1,482                  11.7618 EUR
Purchase        10                     11.5000 EUR
Purchase        84                     11.8200 EUR
Purchase        1,265                  11.8818 EUR
Purchase        1,000                  11.7400 EUR
Purchase        1,505                  11.8018 EUR
Purchase        1,000                  11.8600 EUR
Purchase        1,429                  11.6935 EUR
Purchase        1,110                  11.8518 EUR
Purchase        1,252                  11.6735 EUR
Purchase        1,436                  11.8318 EUR
Purchase        182                    11.8518 EUR
Purchase        259                    11.6935 EUR
Purchase        667                    11.7235 EUR
Purchase        1,252                  11.8118 EUR
Purchase        1,534                  11.7918 EUR
Purchase        1,265                  11.7818 EUR
Purchase        1,342                  11.8518 EUR
Purchase        1,266                  11.6535 EUR
Purchase        1,332                  11.8118 EUR
Purchase        2,150                  11.0000 EUR
Purchase        1,437                  11.8618 EUR
Purchase        1,000                  11.7900 EUR
Purchase        1,220                  11.8118 EUR
Purchase        150                    Transfer
Purchase        2,800                  11.1300 EUR
Purchase        10,000                 11.6700 EUR
Sale            30,000                 11.7790 EUR
Sale            293,611                11.6552 EUR
Sale            270                    11.8100 EUR
Sale            834                    11.6745 EUR
Sale            2,421                  11.1100 EUR
Sale            1,000                  11.8400 EUR
Sale            500                    11.7700 EUR
Sale            431,389                11.7168 EUR
Sale            6,171                  11.1100 EUR
Sale            1,100                  11.8100 EUR
Sale            2,200                  11.9000 EUR
Sale            8,400                  11.0362 EUR
Sale            150                    11.7800 EUR
Sale            51,177                 11.8098 EUR
Sale            18,068                 11.7200 EUR
Sale            100                    11.7700 EUR
Sale            343                    11.6325 EUR
Sale            595,124                11.8159 EUR
Sale            500                    11.6800 EUR
Sale            1,700                  11.7500 EUR
Sale            1,100                  14.0000 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          51177         11.8097
CFD            Long          595124        11.8158
CFD            Short         53400         11.6843
CFD            Short         6600          11.7075

(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                         09 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   -195,381               9.6300           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   -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   -500,000               14.0000          EURO           18/12/2009
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   -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   -250,000               14.5000          AMER           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
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          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          EURO           19/12/2008
Option            Purchased   -410,000               11.9238          EURO           29/09/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   13,400                 11.2500          EURO           12/09/2008
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           17/12/2010
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                 9.5000           EURO           19/12/2008
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   -160                   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   55,000                 12.0000          EURO           19/12/2008
Option            Purchased   -5,000                 15.0000          EURO           19/09/2008
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   120,000                10.5000          EURO           19/06/2009
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           19/12/2008
Option            Purchased   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   500,000                12.0000          AMER           19/12/2008
Option            Purchased   1,000,000              14.0000          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           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   1,000,000              11.0000          AMER           19/09/2008
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   -13,400                12.7500          EURO           12/09/2008
Option            Purchased   500,000                10.5000          AMER           19/06/2009

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