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               14 July 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     355,991,903     5.69%     4,881,374       0.08%
securities
(2) Derivatives   47,529,242     0.76%    74,189,689       1.19%
(other than
options)
(3) Options and   26,447,585     0.42%    25,626,028       0.41%
agreements to
purchase/sell
Total            429,968,730     6.87%   104,697,091       1.67%


(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
                                   (GBP)
Purchase      69,278               11.2400 EUR
Purchase      15,000,000           11.3500 EUR
Purchase      400                  11.3500 EUR
Purchase      2,666                11.2300 EUR
Purchase      150                  11.3900 EUR
Purchase      66                   11.4100 EUR
Purchase      450                  11.2800 EUR
Purchase      3,461                11.2611 EUR
Purchase      64,069               11.3530 EUR
Purchase      100                  11.2000 EUR
Purchase      2,937                11.2400 EUR
Purchase      650                  11.3800 EUR
Purchase      38,935               11.1402 EUR
Purchase      1,846                11.2400 EUR
Purchase      6,905                11.2400 EUR
Purchase      2,370                11.2800 EUR
Purchase      3,900                11.2128 EUR
Purchase      1,056                11.2800 EUR
Purchase      21,889               11.4134 EUR
Purchase      320,584              11.2400 EUR
Purchase      200                  11.2800 EUR
Sale          2,141                11.2700 EUR
Sale          9,322                11.2400 EUR
Sale          158,072              11.3306 EUR
Sale          2,666                11.2300 EUR
Sale          500                  Transfer
Sale          2,672                11.2900 EUR
Sale          23,600               11.3449 EUR
Sale          40,000               11.2383 EUR
Sale          41,667               11.3127 EUR
Sale          10,000               11.1804 EUR
Sale          8,680               11.3506 EUR
Sale          3,461               11.2525 EUR
Sale          657                 11.2600 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          2520          11.2123
CFD            Long          3461          11.2525
CFD            Long          158072        11.3306
CFD            Long          23600         11.3448
CFD            Short         38935         11.1401
CFD            Short         3900          11.2128
CFD            Short         36372         11.2378
CFD            Short         3461          11.2611
CFD            Short         162591        11.2856
CFD            Short         64069         11.3529

(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                         15 July 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      Exercise    Type, e.g.       Expiry date
    e.g. call           purchased     securities to         price     American,
       option                      which the option      (Note 2) European etc.
                                      or derivative
                                            relates
       Option           Purchased          -500,000            12          AMER        19/12/2008
       Option           Purchased           -55,000            12          EURO        19/12/2008
       Option           Purchased        -1,000,000            14          EURO        19/12/2008
       Option           Purchased        -1,000,000            15          EURO        19/06/2009
       Option           Purchased        -1,000,000            15          EURO        17/12/2010
       Option           Purchased          -750,000            14          AMER        18/12/2009
       Option           Purchased          -750,000            14          AMER        18/12/2009
       Option           Purchased        -1,000,000            12          AMER        19/12/2008
       Option           Purchased          -500,000            12          AMER        19/12/2008
       Option           Purchased        -1,000,000            12          AMER        19/12/2008
       Option           Purchased          -500,000            12          AMER        19/12/2008
       Option           Purchased          -500,000            14          EURO        18/12/2009
       Option           Purchased          -500,000            14          EURO        18/12/2009
       Option           Purchased          -500,000            14          EURO        18/12/2009
       Option           Purchased          -410,000       11.9238          EURO        29/09/2008
       Option           Purchased          -304,461          9.19          EURO        19/12/2008
       Option           Purchased          -500,000            12          AMER        19/12/2008
       Option           Purchased             1,000            11          EURO        19/09/2008
       Option           Purchased           -20,000            12          EURO        18/12/2009
       Option           Purchased            -5,000           9.5          EURO        19/12/2008
       Option           Purchased            -5,000            12          EURO        19/06/2009
       Option           Purchased            -5,000            12          EURO        19/06/2009
       Option           Purchased            -5,000            14          EURO        19/09/2008
       Option           Purchased            -5,000            15          EURO        19/09/2008
       Option           Purchased        -1,000,000            14          AMER        19/12/2008
       Option           Purchased            -2,500            14          EURO        19/12/2008
       Option           Purchased          -250,000          12.5          AMER        18/12/2009
       Option           Purchased             5,000            14          EURO        19/09/2008
       Option           Purchased            20,000            12          EURO        18/12/2009
       Option           Purchased            55,000            12          EURO        19/12/2008
       Option           Purchased           120,000          10.5          EURO        19/06/2009
       Option           Purchased        -7,500,000          0.01          EURO        19/09/2008
       Option           Purchased        -2,000,000            21          AMER        19/12/2008
       Option           Purchased            -2,500            12          EURO        19/12/2008
       Option           Purchased           500,000            16          AMER        18/12/2009
       Option           Purchased           215,285          9.29          EURO        20/04/2009
       Option           Purchased           410,000        10.521          EURO        29/09/2008
       Option           Purchased           500,000            10          AMER        19/12/2008
       Option           Purchased           500,000          10.5          AMER        19/06/2009
       Option           Purchased           500,000            14          EURO        18/12/2009
       Option           Purchased           500,000            14          EURO        18/12/2009
       Option           Purchased          -304,461          9.19          EURO        19/12/2008
       Option           Purchased           500,000            16          AMER        18/09/2009
       Option           Purchased            13,400         11.25          EURO        12/09/2008
       Option           Purchased         1,000,000            14          EURO        19/12/2008
       Option           Purchased         1,000,000            15          EURO        19/06/2009
       Option           Purchased         1,000,000            15          EURO        17/12/2010
       Option           Purchased         7,500,000          0.01          EURO        19/09/2008
       Option           Purchased        -1,500,000         13.35          EURO        23/07/2008
       Option           Purchased         1,500,000         13.35          EURO        23/07/2008
       Option           Purchased           500,000            14          EURO        18/12/2009
       Option           Purchased          -135,012         14.02          EURO        18/12/2009
       Option           Purchased        10,000,000         14.54          EURO        23/02/2010
       Option           Purchased          -250,000          14.5          AMER        19/12/2008
       Option           Purchased          -250,000          14.5          AMER        19/12/2008
       Option           Purchased          -195,381          9.63          EURO        19/12/2008
       Option           Purchased          -195,381          9.63          EURO        19/12/2008
       Option           Purchased          -192,806          9.96          EURO        19/12/2008
       Option           Purchased            88,000          12.7          EURO        07/08/2008
       Option           Purchased          -135,012         14.02          EURO        18/12/2009
       Option           Purchased            19,900         13.04          EURO        03/10/2008
       Option           Purchased          -114,995         10.01          EURO        19/12/2008
       Option           Purchased          -114,995         10.01          EURO        19/12/2008
       Option           Purchased           -88,000        14.477          EURO        07/08/2008
       Option           Purchased           -62,159          8.79          EURO        19/12/2008
       Option           Purchased           -62,159          8.79          EURO        19/12/2008
       Option           Purchased           -13,400         12.75          EURO        12/09/2008
       Option           Purchased          -250,000          12.5          AMER        18/12/2009
       Option           Purchased          -192,806          9.96          EURO        19/12/2008