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 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     267,625,863     4.28%      4,803,884     0.08%
securities
(2) Derivatives   47,513,351     0.76%     65,771,493     1.05%
(other than
options)
(3) Options and   22,727,063     0.36%     19,050,128     0.30%
agreements to
purchase/sell
Total            337,866,277     5.40%     89,625,505     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            8,253              10.7180 EUR
Purchase            1,300              Transfer
Purchase            9,838              10.7180 EUR
Purchase            9,327              10.6085 EUR
Purchase            12,012             10.7180 EUR
Purchase            3,100              10.7180 EUR
Purchase            2,385              10.7180 EUR
Purchase            8,850              10.6284 EUR
Purchase            4,682              10.7180 EUR
Purchase            25,832             10.7180 EUR
Purchase            1,142              10.7180 EUR
Purchase            106,700            10.6924 EUR
Purchase            2,850              10.6500 EUR
Purchase            4                  11.1000 EUR
Purchase            5,500              10.8500 EUR
Purchase            38,444             10.7180 EUR
Purchase            6,674              10.7180 EUR
Purchase            2,980              10.9300 EUR
Purchase            400                10.8000 EUR
Purchase            210,087            10.6481 EUR
Purchase            1,000              10.7300 EUR
Purchase            500                10.8200 EUR
Purchase            150                10.7400 EUR
Purchase            142,176            10.7180 EUR
Purchase            42,515             10.7180 EUR
Purchase            51,419             10.6500 EUR
Purchase            2,000              11.0700 EUR
Purchase            59,960             10.6500 EUR
Purchase            26,888             10.6500 EUR
Purchase            3,986              10.7180 EUR
Purchase            1,264              10.8500 EUR
Purchase            53,318             10.6500 EUR
Purchase            34,439             10.7180 EUR
Purchase            4,028              10.7180 EUR
Purchase            296                11.1200 EUR
Purchase            136                10.5000 EUR
Purchase            200                10.6000 EUR
Purchase            3,000              10.7800 EUR
Purchase            283                10.6100 EUR
Purchase            1,200              10.8500 EUR
Purchase            650                10.4500 EUR
Purchase            168                10.7200 EUR
Purchase            1,702              10.7669 EUR
Purchase            90                 11.1800 EUR
Purchase            1,000              10.5000 EUR
Purchase            1,000              10.5600 EUR
Purchase            1,300              Transfer
Purchase            3,000              11.0400 EUR
Purchase            609                Transfer
Purchase            36,034             10.9916 EUR
Purchase            10,968             11.3000 EUR
Purchase            760                10.5500 EUR
Purchase            1,400              10.8500 EUR
Purchase            64,816             10.6516 EUR
Purchase            136                10.5000 EUR
Purchase            300,000            10.6500 EUR
Purchase            100                10.5000 EUR
Sale                46,376             10.6500 EUR
Sale                100                11.1600 EUR
Sale                10,968             11.3000 EUR
Sale                229,430            10.6484 EUR
Sale                4,419              10.6500 EUR
Sale                77,042             10.6484 EUR
Sale                176,408            10.6500 EUR
Sale                4,048              10.6500 EUR
Sale                300,000            10.6500 EUR
Sale                10,912             10.6500 EUR
Sale                13,000             11.2500 EUR
Sale                545                11.2000 EUR
Sale                3,000              10.6500 EUR
Sale                8,146              11.0797 EUR
Sale                1,700              10.7200 EUR
Sale                5                  10.5600 EUR
Sale                2,728              10.6500 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          8057          10.9206
CFD            Short         13525         10.8662
CFD            Short         12804         10.8663
CFD            Short         27770         11.0508

(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 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   -1,500,000             10.0000          EURO           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           18/09/2009
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
Option            Purchased   433,000                9.4140           EURO           29/12/2008
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   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   500,000                10.5000          AMER           19/12/2008
Option            Purchased   -15,000                11.0000          EURO           18/12/2009
Option            Purchased   -1,500,000             11.5000          EURO           18/12/2009
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   16,278                 14.4300          EURO           07/01/2009
Option            Purchased   215,285                9.2900           EURO           20/04/2009
Option            Purchased   250,000                10.5000          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   -2,000,000             21.0000          AMER           19/12/2008
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   -304,461               9.1900           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   -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   -1,000,000             15.0000          EURO           19/06/2009
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             12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             14.0000          AMER           19/12/2008
Option            Purchased   -250,000               12.5000          AMER           18/12/2009
Option            Purchased   -1,000,000             15.0000          EURO           17/12/2010
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
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   -433,000               10.6692          EURO           29/12/2008
Option            Purchased   -1,000,000             14.0000          EURO           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