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               10 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     269,509,964     4.31%     11,627,282     0.19%
securities
(2) Derivatives   47,513,351     0.76%     65,812,828     1.05%
(other than
options)
(3) Options and   22,727,063     0.36%     19,050,128     0.30%
agreements to
purchase/sell
Total            339,750,378     5.43%     96,490,238     1.54%


(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               125                   9.35 EUR
Purchase               150                   9.85 EUR
Purchase               250                   9.22 EUR
Purchase               133                   9.42 EUR
Purchase               1,000                 9.53 EUR
Purchase               334                   9 EUR
Purchase               1,200                 9.49 EUR
Purchase               500                   9.85 EUR
Purchase               120                   9 EUR
Purchase               120                   9.18 EUR
Purchase               72                    9.22 EUR
Purchase               210                   9.29 EUR
Purchase               95                    9.52 EUR
Purchase               2,000                 9.2 EUR
Purchase               2,000                 9.85 EUR
Purchase               500                   9.32 EUR
Purchase               200                   9.52 EUR
Purchase               250                   9.15 EUR
Purchase               350                   9.22 EUR
Purchase               92                    10.3 EUR
Purchase               3,215                 9.23 EUR
Purchase               400                   9.2 EUR
Purchase               450                   9.6 EUR
Purchase               250                   9.41 EUR
Purchase               110                   9.33 EUR
Purchase               110,273               8.9765 EUR
Purchase               500                   9.01 EUR
Purchase               600                   9.19 EUR
Purchase               600                   9.35 EUR
Purchase               1,500                 9.22 EUR
Purchase               300                   9.8 EUR
Purchase               650                   9.22 EUR
Purchase               2,000                 9.43 EUR
Purchase               600                   9.85 EUR
Purchase               600                   9.85 EUR
Purchase               3,006                 10.3 EUR
Purchase               213                   9.32 EUR
Purchase               250                   9.5 EUR
Purchase               175                   9.32 EUR
Purchase               2,000                 9.25 EUR
Purchase               250                   9.38 EUR
Purchase               110                   9.33 EUR
Purchase               200                   9.32 EUR
Purchase               300                   10.3 EUR
Purchase               250                   9.2 EUR
Purchase               50                    9.22 EUR
Purchase               1,250                 9.1 EUR
Purchase               60                    9.6 EUR
Purchase               2,050                 9.23 EUR
Purchase               180                   9.85 EUR
Purchase               20                    9.12 EUR
Purchase               130                   9.27 EUR
Purchase               1,867                 9.41 EUR
Purchase               500                   9.38 EUR
Purchase               500                   9.22 EUR
Purchase               2,500                 9.41 EUR
Purchase               300                   9.4 EUR
Purchase               8,300                 10.87 EUR
Purchase               110                   9.3814 EUR
Purchase               2,050                 9.56 EUR
Purchase               300                   9.31 EUR
Purchase               220                   9.54 EUR
Purchase               150                   9.31 EUR
Purchase               3,500                 9.55 EUR
Purchase               155                   9 EUR
Purchase               300                   9.2 EUR
Purchase               100                   9.35 EUR
Purchase               500                   9.33 EUR
Purchase               325                   9.21 EUR
Purchase               200                   9.14 EUR
Purchase               652,542               9.3923 EUR
Purchase               1,280                 9.5214 EUR
Purchase               327                   9.2 EUR
Purchase               500                   9.05 EUR
Purchase               200                   9.35 EUR
Purchase               48                    9.2 EUR
Purchase               108                   9.09 EUR
Purchase               110                   9.39 EUR
Purchase               200                   9.47 EUR
Purchase               320                   9.37 EUR
Purchase               1,000                 9.26 EUR
Purchase               400                   9.85 EUR
Purchase               293,611               Transfer
Purchase               600                   9.59 EUR
Purchase               120                   9.26 EUR
Purchase               150                   9.31 EUR
Purchase               2,000                 9.3 EUR
Purchase               1,000                 9.25 EUR
Purchase               903                   9 EUR
Purchase               14,255                Transfer
Purchase               1,000                 9.04 EUR
Purchase               3,000                 9.2 EUR
Purchase               6,450                 9.26 EUR
Purchase               210,406               Transfer
Purchase               100                   9.22 EUR
Purchase               23,976                9.07 EUR
Purchase               5,873                 8.9765 EUR
Purchase               3,000                 9.85 EUR
Purchase               2,284                 8.9765 EUR
Purchase               100                   9 EUR
Purchase               94,859                8.9765 EUR
Purchase               45,318                Transfer
Purchase               200                   9.3 EUR
Purchase               2,207                 8.9765 EUR
Purchase               500                   9 EUR
Purchase               17,024                8.9765 EUR
Purchase               24,516                Transfer
Purchase               200                   9.05 EUR
Purchase               56,990                8.9765 EUR
Purchase               5,682                 8.9765 EUR
Purchase               82,721                9.85 EUR
Purchase               489,919               9.07 EUR
Purchase               160,311               9.07 EUR
Purchase               5,816                 8.9765 EUR
Purchase               2,364                 8.9765 EUR
Purchase               9,416                 9.07 EUR
Purchase               26,211                9.07 EUR
Purchase               16,818                8.9765 EUR
Purchase               12,506                8.9765 EUR
Purchase               600                   9.34 EUR
Purchase               98                    9.02 EUR
Purchase               87,035                8.9765 EUR
Purchase               50                    9.85 EUR
Purchase               400                   9.32 EUR
Purchase               3,000                 9.05 EUR
Purchase               1,145                 9.85 EUR
Purchase               220                   8.98 EUR
Purchase               11                    9.26 EUR
Purchase               450                   9.14 EUR
Purchase               666                   9 EUR
Purchase               20                    9.36 EUR
Purchase               6,717                 9.07 EUR
Purchase               250                   9 EUR
Purchase               220                   9.5 EUR
Purchase               20                    9.33 EUR
Purchase               200                   9.2 EUR
Purchase               100                   9.32 EUR
Purchase               555                   9 EUR
Purchase               331                   9.04 EUR
Purchase               1,800                 9.18 EUR
Purchase               95,904                9.07 EUR
Purchase               250                   9.27 EUR
Purchase               300                   9.4 EUR
Purchase               50                    9.37 EUR
Purchase               550                   Transfer
Purchase               500                   9.4 EUR
Purchase               105                   9.4 EUR
Purchase               26,868                9.2977 EUR
Sale                   10,037                9.2394 EUR
Sale                   8,366                 9.3311 EUR
Sale                   17,952                9.3311 EUR
Sale                   13,246                9.3311 EUR
Sale                   600                   9.38 EUR
Sale                   101,993               9.2394 EUR
Sale                   92                    10.3 EUR
Sale                   2,936                 9.3453 EUR
Sale                   64,843                9.2394 EUR
Sale                   4,529                 9.85 EUR
Sale                   1,000                 10.85 EUR
Sale                   2,800                 9.2 EUR
Sale                   350                   9.43 EUR
Sale                   3,006                 10.3 EUR
Sale                   12,951                9.07 EUR
Sale                   117                   Transfer
Sale                   23,255                9.2816 EUR
Sale                   300                   10.3 EUR
Sale                   100                   9.85 EUR
Sale                   740                   9.38 EUR
Sale                   1,000                 9.85 EUR
Sale                   45,318                9.07 EUR
Sale                   14,255                9.07 EUR
Sale                   24,516                9.07 EUR
Sale                   640                   9.2 EUR
Sale                   1,300                 9.3 EUR
Sale                   52,458                9.2394 EUR
Sale                   263                   8.32
Sale                   12,755                9.2394 EUR
Sale                   1,035                 9.13 EUR
Sale                   21,581                9.2394 EUR
Sale                   28,250                9.2394 EUR
Sale                   8,417                 9.2394 EUR
Sale                   1,967                 9.2394 EUR
Sale                   107,615               9.07 EUR
Sale                   150,661               9.07 EUR
Sale                   25,248                9.07 EUR
Sale                   27,879                9.07 EUR
Sale                   12,621                9.2394 EUR
Sale                   1,825                 9.2394 EUR
Sale                   210,406               9.07 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          9090          9.28

(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                         13 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 18/12/2009
Option            Purchased   500,000                16.0000          AMER 18/09/2009
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 17/12/2010
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          AMER 19/12/2008
Option            Purchased   -1,000,000             12.0000          EURO 18/12/2009
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 19/06/2009
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