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               16 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     302,073,924     4.83%      2,748,319     0.04%
securities
(2) Derivatives   45,739,177     0.73%     78,352,511     1.25%
(other than
options)
(3) Options and   27,613,685     0.44%     23,517,288     0.38%
agreements to
purchase/sell
Total            375,426,786     6.00%    104,618,118     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           Price per unit
                   Securities
Purchase           800                 10.1600 EUR
Purchase           13,296              10.5800 EUR
Purchase           350                 10.1000 EUR
Purchase           100                 10.1300 EUR
Purchase           500,000             10.3178 EUR
Purchase           2,000               10.2600 EUR
Purchase           1,000               10.1500 EUR
Purchase           200                 10.1300 EUR
Purchase           150                 10.1400 EUR
Purchase           880                 10.2500 EUR
Purchase           6,019               10.1700 EUR
Purchase           5,000               10.2500 EUR
Purchase           10,228              10.1041 EUR
Purchase           1,000               10.0000 EUR
Purchase           306,131             10.2042 EUR
Purchase           1,400               9.8000 EUR
Purchase           600                 10.0000 EUR
Purchase           952                 10.2800 EUR
Purchase           98                  10.1000 EUR
Purchase           300                 10.0000 EUR
Purchase           15                  10.0000 EUR
Purchase           500                 10.3200 EUR
Purchase           51,881              10.1600 EUR
Purchase           100                 10.2800 EUR
Purchase           250                 10.3100 EUR
Purchase           230,000             10.1473 EUR
Purchase           119,844             10.5800 EUR
Purchase           170                 10.4200 EUR
Purchase           2,150               10.5000 EUR
Purchase           576                 10.3000 EUR
Purchase           120                 10.2800 EUR
Purchase           2,000               10.3300 EUR
Purchase           300                 10.0000 EUR
Purchase           2,950               10.1700 EUR
Purchase           600                 10.1500 EUR
Purchase           3,800               10.6100 EUR
Purchase           25                  10.2900 EUR
Purchase           590                 10.1800 EUR
Purchase           500                 10.1400 EUR
Purchase           1,000               10.3500 EUR
Purchase           300                 10.3000 EUR
Purchase           500                 10.0000 EUR
Purchase           300                 10.2800 EUR
Purchase           53,303              10.3300 EUR
Purchase           230                 9.9000 EUR
Purchase           4,445               10.1400 EUR
Purchase           12,634              10.3100 EUR
Purchase           44,080              10.5600 EUR
Purchase           115,000             10.3746 EUR
Purchase           1,000               10.1900 EUR
Purchase           140                 10.1100 EUR
Purchase           5,650,600           10.1200 EUR
Purchase           580                 10.2700 EUR
Purchase           500                 9.9500 EUR
Purchase           500                 9.9100 EUR
Purchase           36,990              10.1725 EUR
Purchase           9,684               10.5800 EUR
Purchase           1,554               10.5800 EUR
Purchase           623                 10.5800 EUR
Purchase           25,451              10.5800 EUR
Purchase           12,250              10.3299 EUR
Purchase           4,097               10.2826 EUR
Purchase           5,273               10.5800 EUR
Purchase           1,245               10.5800 EUR
Purchase           25,451              10.5800 EUR
Purchase           3,257,253           10.4403 EUR
Purchase           31,795              10.5800 EUR
Purchase           1,146               10.2469 EUR
Purchase           1,342               10.3900 EUR
Purchase           6,066               10.5800 EUR
Purchase           24,848              10.5800 EUR
Sale               8,400               10.7331 EUR
Sale               65,086              10.3113 EUR
Sale               1,400               10.2400 EUR
Sale               46,840              10.3113 EUR
Sale               10,634              10.3113 EUR
Sale               3,500,000           10.5600 EUR
Sale               135,464             10.1981 EUR
Sale               1,539               10.1486 EUR
Sale               149,876             10.1981 EUR
Sale               7,000               10.8700 EUR
Sale               1,469               10.4400 EUR
Sale               80,991              10.1979 EUR
Sale               28,497              10.3113 EUR
Sale               16,080              10.3113 EUR
Sale               1,000               10.1085 EUR
Sale               36,417              10.3113 EUR
Sale               27,832              10.3113 EUR
Sale               18,888              10.3113 EUR
Sale               8,968               10.3113 EUR
Sale               24,860              10.3113 EUR
Sale               122,118             10.3113 EUR
Sale               49,608              10.3113 EUR
Sale               30,103              10.3113 EUR
Sale               966                 10.4200 EUR
Sale               4,392               10.5922 EUR
Sale               16,953              10.3113 EUR
Sale               92,274              10.2805 EUR
Sale               44,080              10.5600 EUR
Sale               4,457               10.5800 EUR
Sale               416,932             10.1981 EUR
Sale               26,100              10.4913 EUR
Sale               27,650              10.1976 EUR
Sale               40,439              10.1977 EUR
Sale               3,120               10.2400 EUR
Sale               85,900              10.1980 EUR
Sale               24,605              10.5600 EUR
Sale               20                  10.4200 EUR
Sale               2,276               10.4178 EUR
Sale               4,064               10.3113 EUR
Sale               1,383,706           10.1981 EUR
Sale               211,589             10.1981 EUR
Sale               96,156              10.1982 EUR
Sale               58,809              10.1976 EUR
Sale               1,400               10.4000 EUR
Sale               1,000               10.4200 EUR
Sale               4,615               10.5800 EUR
Sale               15,202              10.2805 EUR
Sale               11,252              10.2805 EUR
Sale               8,886               10.2805 EUR
Sale               5,650,600           10.1200 EUR
Sale               7,421               10.1976 EUR
Sale               7,551               10.1976 EUR
Sale               38,715              10.1977 EUR
Sale               135                 10.2800 EUR
Sale               28,863              10.1976 EUR
Sale               4,500               10.7000 EUR
Sale               15,626              10.1973 EUR
Sale               73,552              10.1979 EUR
Sale               39,920              10.1977 EUR
Sale               57,091              10.1978 EUR
Sale               15,597              9.9312 EUR
Sale               8,900               10.5439 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          1539          10.1486
CFD            Long          61399         10.3329
CFD            Long          2276          10.4178
CFD            Long          26100         10.4913
CFD            Long          8900          10.5439
CFD            Short         10228         10.1041
CFD            Short         36990         10.1725
CFD            Short         306131        10.2042

(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                         17 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                14.0000          EURO           18/12/2009
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
Option            Purchased   215,285                9.2900           EURO           20/04/2009
Option            Purchased   250,000                10.5000          AMER           19/12/2008
Option            Purchased   410,000                10.5210          EURO           29/09/2008
Option            Purchased   500,000                10.0000          AMER           19/12/2008
Option            Purchased   -7,500,000             0.0100           EURO           19/09/2008
Option            Purchased   500,000                12.0000          AMER           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   500,000                16.0000          AMER           18/12/2009
Option            Purchased   1,000,000              11.0000          AMER           19/09/2008
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   500,000                10.5000          AMER           19/12/2008
Option            Purchased   120,000                10.5000          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   1,000                  11.0000          EURO           19/09/2008
Option            Purchased   5,000                  14.0000          EURO           19/09/2008
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   10,000                 12.0000          EURO           19/12/2008
Option            Purchased   -2,000,000             21.0000          AMER           19/12/2008
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   -160                   14.0000          EURO           19/09/2008
Option            Purchased   7,500                  12.0000          EURO           19/12/2008
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   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -410,000               11.9238          EURO           29/09/2008
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           17/12/2010
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
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          AMER           19/12/2008
Option            Purchased   -304,461               9.1900           EURO           19/12/2008
Option            Purchased   -1,000,000             15.0000          EURO           19/06/2009
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               12.0000          AMER           19/12/2008
Option            Purchased   -500,000               14.0000          EURO           18/12/2009
Option            Purchased   1,000,000              15.0000          EURO           17/12/2010
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