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               18 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     299,586,155     4.79%      4,050,308     0.06%
securities
(2) Derivatives   45,602,841     0.73%     77,719,130     1.24%
(other than
options)
(3) Options and   29,373,685     0.47%     25,277,288     0.40%
agreements to
purchase/sell
Total            374,562,681     5.99%    107,046,726     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           Price per unit
                   Securities
Purchase           1,000               10.0700 EUR
Purchase           1,000               10.0000 EUR
Purchase           300                 9.8800 EUR
Purchase           291,917             10.3007 EUR
Purchase           1,900               10.2000 EUR
Purchase           500,000             10.1000 EUR
Purchase           100                 9.9500 EUR
Purchase           441,020             9.9500 EUR
Purchase           603,800             10.1000 EUR
Purchase           500,000             9.9930 EUR
Purchase           2,012               10.3422 EUR
Purchase           450                 10.3500 EUR
Purchase           200                 9.9600 EUR
Purchase           230,000             10.2415 EUR
Purchase           2,000               10.4600 EUR
Purchase           200                 Transfer
Purchase           200                 Transfer
Purchase           30                  10.1800 EUR
Purchase           200                 Transfer
Purchase           163                 9.9900 EUR
Purchase           100                 9.9600 EUR
Purchase           2,000               9.9600 EUR
Purchase           52,504              9.9502 EUR
Purchase           126,891             10.2608 EUR
Purchase           2,843               10.5700 EUR
Purchase           400                 9.8700 EUR
Purchase           290                 10.2500 EUR
Purchase           188                 10.3700 EUR
Purchase           24,485              10.2031 EUR
Purchase           641,500             10.0568 EUR
Purchase           610                 9.9000 EUR
Purchase           4,500               10.0287 EUR
Purchase           8,516               10.3500 EUR
Purchase           1,400               9.8672 EUR
Purchase           2,500               10.0400 EUR
Purchase           35,500              10.1000 EUR
Purchase           200                 Transfer
Purchase           273,759             10.0752 EUR
Purchase           13,164              10.1057 EUR
Purchase           560,487             9.9500 EUR
Purchase           143,592             9.9500 EUR
Purchase           5,866               9.9500 EUR
Sale               1,000               9.9600 EUR
Sale               1,500               10.0900 EUR
Sale               2,621               10.2637 EUR
Sale               1,373               10.2637 EUR
Sale               5,761               10.2658 EUR
Sale               2,940               10.2638 EUR
Sale               7,915               10.2665 EUR
Sale               65,119              10.2459 EUR
Sale               21,234              10.2695 EUR
Sale               3,818               10.2645 EUR
Sale               5,000               10.3700 EUR
Sale               3,270               10.2644 EUR
Sale               38,767              10.2063 EUR
Sale               1,085               10.2650 EUR
Sale               500,000             10.3244 EUR
Sale               135,800             10.2324 EUR
Sale               3,978               10.2648 EUR
Sale               1,280               10.2643 EUR
Sale               603,800             10.1000 EUR
Sale               498                 9.9600 EUR
Sale               3,000               10.1669 EUR
Sale               163                 9.9900 EUR
Sale               3,139               10.2640 EUR
Sale               5,000               10.7300 EUR
Sale               3,747               10.2642 EUR
Sale               498                 10.0500 EUR
Sale               24,485              9.9470 EUR
Sale               1,725               10.2635 EUR
Sale               11,551              10.2674 EUR
Sale               35,553              10.2692 EUR
Sale               147,614             10.0567 EUR
Sale               2,000               10.2800 EUR
Sale               500,000             10.1000 EUR
Sale               500                 Transfer
Sale               4,081               9.9500 EUR
Sale               8,177               10.2664 EUR
Sale               649                 10.1600 EUR
Sale               8,530               10.2667 EUR
Sale               12,226              10.2682 EUR
Sale               19,284              10.0300 EUR
Sale               1,030,620           9.9449 EUR
Sale               52,097              9.9500 EUR
Sale               39,997              9.9500 EUR
Sale               90,078              10.2690 EUR
Sale               385,646             9.9500 EUR
Sale               1,117               10.2646 EUR
Sale               13,371              10.2692 EUR
Sale               128,848             10.2690 EUR
Sale               10,816              9.9500 EUR
Sale               294,582             10.2692 EUR
Sale               89,102              10.2690 EUR
Sale               18,147              10.2694 EUR
Sale               18,312              10.2695 EUR
Sale               5,771               10.2658 EUR
Sale               6,376               10.2659 EUR
Sale               250                 9.9600 EUR
Sale               8,393               10.2667 EUR
Sale               2,012               10.0429 EUR
Sale               86,614              10.2690 EUR
Sale               950                 8.0700
Sale               1,715               10.2635 EUR
Sale               1,764               10.2630 EUR
Sale               11,028              10.2671 EUR
Sale               3,660               10.0476 EUR
Sale               15,869              10.2694 EUR
Sale               4,000               10.7200 EUR
Sale               9,577               10.0921 EUR
Sale               1,100               10.1800 EUR
Sale               62,199              10.2690 EUR
Sale               1,400               9.9478 EUR
Sale               218,396             10.2691 EUR
Sale               9,642               10.1235 EUR
Sale               6,512               10.2661 EUR
Sale               92,463              10.2690 EUR
Sale               641,500             10.0588 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          19284         10.03
CFD            Long          2012          10.0428
CFD            Long          3660          10.0475
CFD            Long          9642          10.1235
CFD            Long          38767         10.2063
CFD            Long          135800        10.2324
CFD            Long          1400          9.9477
CFD            Short         4500          10.0286
CFD            Short         2500          10.04
CFD            Short         123156        10.1256
CFD            Short         2012          10.3421
CFD            Short         1400          9.8672
CFD            Short         52504         9.9501

(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            Purchase          260000             10.5      EURO           19/12/2008    0.8112
Call            Purchase          1500000            10        EURO           19/12/2008    0.7975
Put             Purchase          260000             10        EURO           19/12/2008    0.704
Put             Sale              1500000             10       EURO           19/12/2008     .8734


(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                         19 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   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   -55,000                12.0000          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   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   -1,000,000             14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             14.0000          AMER           19/12/2008
Option            Purchased   -1,500,000             10.0000          EURO           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   -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   -410,000               11.9238          EURO           29/09/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
Option            Purchased   5,000                  14.0000          EURO           19/09/2008
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   -5,000                 15.0000          EURO           19/09/2008
Option            Purchased   -5,000                 9.5000           EURO           19/12/2008
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   -1,000,000             12.0000          AMER           19/12/2008
Option            Purchased   1,000                  11.0000          EURO           19/09/2008
Option            Purchased   -250,000               12.5000          AMER           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   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   55,000                 12.0000          EURO           19/12/2008
Option            Purchased   120,000                10.5000          EURO           19/06/2009
Option            Purchased   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   -160                   14.0000          EURO           19/09/2008
Option            Purchased   1,000,000              12.0000          EURO           18/12/2009
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   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   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   1,000,000              11.0000          AMER           19/09/2008
Option            Purchased   215,285                9.2900           EURO           20/04/2009
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              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   7,500,000              0.0100           EURO           19/09/2008
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   -135,012               14.0200          EURO           18/12/2009
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
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   -195,381               9.6300           EURO           19/12/2008
Option            Purchased   260,000                9.7500           EURO           19/12/2008
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   250,000                10.5000          AMER           19/12/2008
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   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   -260,000               10.5000          EURO           19/12/2008
Option            Purchased   -192,806               9.9600           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