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               02 October 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     269,025,843     4.30%      4,642,143     0.07%
securities
(2) Derivatives   47,542,381     0.76%     65,697,520     1.05%
(other than
options)
(3) Options and   22,990,685     0.37%     19,310,128     0.31%
agreements to
purchase/sell
Total            339,558,909     5.43%     89,649,791     1.43%


(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            3,750              Transfer
Purchase            100,000            10.8660 EUR
Purchase            790                11.1500 EUR
Purchase            10                 10.9000 EUR
Purchase            4,250              Transfer
Purchase            13,448             10.8600 EUR
Purchase            177                11.2194 EUR
Purchase            120,112            10.8600 EUR
Purchase            360                11.3500 EUR
Purchase            812,019            11.2654 EUR
Purchase            11,822             10.9100 EUR
Purchase            4,200              10.8600 EUR
Purchase            3,750              Transfer
Purchase            4,250              Transfer
Purchase            200                11.2500 EUR
Purchase            107                10.9000 EUR
Purchase            1,704              11.3017 EUR
Purchase            5,833              11.0590 EUR
Purchase            7,660              10.8600 EUR
Purchase            44,102             10.8600 EUR
Purchase            7,236              10.8600 EUR
Purchase            3,777              10.8600 EUR
Purchase            70,500             10.9100 EUR
Purchase            958                10.9000 EUR
Sale                9,741              11.1955 EUR
Sale                1,000              11.3500 EUR
Sale                4,936              11.1955 EUR
Sale                500                11.2300 EUR
Sale                500                11.2300 EUR
Sale                400                11.2400 EUR
Sale                154,043            11.3215 EUR
Sale                812,019            11.2654 EUR
Sale                4,200              10.8600 EUR
Sale                1,500,000          11.3794 EUR
Sale                84,944             11.1847 EUR
Sale                2,000              11.3700 EUR
Sale                12,367             10.8600 EUR
Sale                12,367             10.8600 EUR
Sale                150                11.0800 EUR
Sale                1,165              11.3300 EUR
Sale                80                 11.3200 EUR
Sale                5,700              11.1800 EUR
Sale                14,593             10.8600 EUR
Sale                4,300              11.3100 EUR
Sale                1,000              11.2400 EUR
Sale                2,003              10.8600 EUR
Sale                11,822             10.9100 EUR
Sale                22,000             11.2892 EUR
Sale                300                8.7300
Sale                1,818              11.2683 EUR
Sale                1,357              11.2276 EUR
Sale                300                11.2500 EUR
Sale                465                11.3500 EUR
Sale                991                10.8700 EUR
Sale                62,130             11.0299 EUR
Sale                62,130             11.0299 EUR
Sale                3,383              11.1955 EUR
Sale                816,219            11.2633 EUR
Sale                4,399              10.9100 EUR
Sale                369,008            11.3413 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          4399          10.91
CFD            Short         136572        11.1814
CFD            Short         3909          11.3129

(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)
call            selling           1500000            11.5      EURO           18/12/2009   1.83
Put             selling           1500000            11.5      EURO           18/12/2009   1.65

(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                         03 October 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                10.5000          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                16.0000          AMER           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   -1,500,000             10.0000          EURO           19/12/2008
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   260,000                9.7500           EURO           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   1,000,000              15.0000          EURO           17/12/2010
Option            Purchased   1,500,000              10.0000          EURO           19/12/2008
Option            Purchased   1,500,000              11.5000          EURO           18/12/2009
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   600,000                12.5000          AMER           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   120,000                10.5000          EURO           19/06/2009
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   433,000                9.4140           EURO           29/12/2008
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   250,000                10.5000          AMER           19/12/2008
Option            Purchased   -1,500,000             11.5000          EURO           18/12/2009
Option            Purchased   -15,000                11.0000          EURO           18/12/2009
Option            Purchased   -192,806               9.9600           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   -2,000,000             21.0000          AMER           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   -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   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             12.0000          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   -1,000,000             14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             14.0000          AMER           19/12/2008
Option            Purchased   -260,000               10.5000          EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
Option            Purchased   -304,461               9.1900           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   -433,000               10.6692          EURO           29/12/2008
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
Option            Purchased   -1,000,000             15.0000          EURO           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