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               29 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     273,224,113     4.37%      2,975,596     0.05%
securities
(2) Derivatives   45,667,017     0.73%     65,698,010     1.05%
(other than
options)
(3) Options and   21,057,685     0.34%     17,377,128     0.28%
agreements to
purchase/sell
Total            339,948,815     5.44%     86,050,734     1.38%


(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          Price per unit
                    Securities
Purchase            1,500              10.6300 EUR
Purchase            240,225            10.4600 EUR
Purchase            258                10.7500 EUR
Purchase            1,400              10.5500 EUR
Purchase            400                10.6500 EUR
Purchase            1,150              10.5000 EUR
Purchase            200                10.5000 EUR
Purchase            100                10.6500 EUR
Purchase            1,000              10.7000 EUR
Purchase            411,600            10.9100 EUR
Purchase            8,911              10.4600 EUR
Purchase            800                10.9200 EUR
Purchase            1,833              10.6124 EUR
Purchase            433,000            10.9100 EUR
Purchase            28,900             10.4624 EUR
Purchase            43,932             10.4600 EUR
Purchase            1,000              10.4900 EUR
Purchase            1,250              10.5000 EUR
Purchase            140,000            10.7848 EUR
Purchase            11                 10.9200 EUR
Purchase            562,717            10.6005 EUR
Purchase            1,000              10.9100 EUR
Purchase            9,642              10.4600 EUR
Purchase            1,833              10.6124 EUR
Purchase            800                10.5100 EUR
Purchase            100                10.9200 EUR
Purchase            200,000            10.4624 EUR
Purchase            600                10.5000 EUR
Purchase            182                10.5300 EUR
Purchase            200                10.9200 EUR
Purchase            300                10.6100 EUR
Purchase            733                10.9100 EUR
Purchase            3,103              10.4576 EUR
Purchase            1,000              10.9100 EUR
Purchase            2,171              10.4600 EUR
Purchase            9,991              10.4600 EUR
Purchase            4,387              10.5616 EUR
Purchase            107,955            10.4600 EUR
Purchase            7,660              10.4600 EUR
Sale                11                 10.9200 EUR
Sale                5,874              10.5734 EUR
Sale                2,537              10.5734 EUR
Sale                200                10.9200 EUR
Sale                3,753              10.5734 EUR
Sale                433,000            10.9100 EUR
Sale                800                10.9200 EUR
Sale                100                10.9200 EUR
Sale                128,624            10.4600 EUR
Sale                31,588             10.5734 EUR
Sale                26,278             10.5734 EUR
Sale                250,000            10.5754 EUR
Sale                25,007             10.4576 EUR
Sale                1,833              10.6124 EUR
Sale                8,911              10.4600 EUR
Sale                800                10.5300 EUR
Sale                34,354             10.5734 EUR
Sale                8,813              10.5601 EUR
Sale                143,940            10.4600 EUR
Sale                47,075             10.4600 EUR
Sale                14,018             10.5734 EUR
Sale                20,898             10.4600 EUR
Sale                25,270             10.5734 EUR
Sale                11,161             10.5734 EUR
Sale                562,717            10.6005 EUR
Sale                17,348             10.5734 EUR
Sale                45,402             10.5734 EUR
Sale                271,470            10.5734 EUR
Sale                82,294             10.5734 EUR
Sale                17,135             10.5734 EUR
Sale                8,269              10.5734 EUR
Sale                411,600            10.9100 EUR
Sale                5,560              10.5734 EUR
Sale                775                10.5500 EUR
Sale                11,685             10.5734 EUR
Sale                330                10.9375 EUR
Sale                285                10.5300 EUR
Sale                3,103              10.4576 EUR
Sale                8,134              10.5734 EUR
Sale                15,050             10.5734 EUR
Sale                5,044              10.5734 EUR
Sale                565,820            10.5997 EUR
Sale                20,097             10.5734 EUR
Sale                20,251             10.7109 EUR
Sale                3,500              10.9100 EUR
Sale                108,102            10.4600 EUR
Sale                133,501            10.5869 EUR
Sale                6,286              10.5734 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          1844          10.46
CFD            Long          133501        10.5869
CFD            Short         9642          10.46
CFD            Short         3216          10.5567
CFD            Short         10951         10.5569

(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                         30 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   250,000                10.5000          AMER           19/12/2008
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   1,500,000              10.0000          EURO           19/12/2008
Option            Purchased   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   1,000,000              15.0000          EURO           17/12/2010
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              12.0000          EURO           18/12/2009
Option            Purchased   600,000                12.5000          AMER           19/12/2008
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   500,000                12.0000          AMER           19/12/2008
Option            Purchased   500,000                10.5000          AMER           19/12/2008
Option            Purchased   -1,500,000             10.0000          EURO           19/12/2008
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   7,500                  12.0000          EURO           19/12/2008
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   -15,000                11.0000          EURO           18/12/2009
Option            Purchased   260,000                9.7500           EURO           19/12/2008
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   -5,000                 9.5000           EURO           19/12/2008
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   215,285                9.2900           EURO           20/04/2009
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   120,000                10.5000          EURO           19/06/2009
Option            Purchased   -304,461               9.1900           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   -114,995               10.0100          EURO           19/12/2008
Option            Purchased   -114,995               10.0100          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   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -250,000               14.5000          AMER           19/12/2008
Option            Purchased   -250,000               14.5000          AMER           19/12/2008
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   -2,000,000             21.0000          AMER           19/12/2008
Option            Purchased   -500,000               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          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   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   -260,000               10.5000          EURO           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   -304,461               9.1900           EURO           19/12/2008
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