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               23 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     279,671,268     4.47%      2,998,714     0.05%
securities
(2) Derivatives   45,835,231     0.73%     66,230,731     1.06%
(other than
options)
(3) Options and   21,467,685     0.34%     17,772,128     0.28%
agreements to
purchase/sell
Total            346,974,184     5.55%     87,001,573     1.39%


(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              10.6100 EUR
Purchase            1,872              10.8000 EUR
Purchase            60,056             10.5100 EUR
Purchase            1,100              10.5000 EUR
Purchase            12,200             10.5900 EUR
Purchase            200                10.5000 EUR
Purchase            500                10.5500 EUR
Purchase            105                10.4700 EUR
Purchase            68,302             10.5376 EUR
Purchase            8,500              11.1400 EUR
Purchase            274,773            10.6076 EUR
Purchase            5,600              10.9100 EUR
Purchase            9,261              10.8000 EUR
Purchase            428                10.7524 EUR
Purchase            100,000            10.4924 EUR
Purchase            100,000            10.5765 EUR
Purchase            2,000              10.5700 EUR
Purchase            385                10.4531 EUR
Purchase            1,888              10.5100 EUR
Purchase            385                10.4531 EUR
Purchase            39,339             10.6973 EUR
Purchase            4,387              10.5206 EUR
Purchase            1,000              10.6000 EUR
Purchase            39,339             10.6972 EUR
Sale                52,102             10.5100 EUR
Sale                35,921             10.5100 EUR
Sale                104,546            10.5433 EUR
Sale                221                10.6278 EUR
Sale                165,978            10.5434 EUR
Sale                354                10.6275 EUR
Sale                817                10.6276 EUR
Sale                2,516,816          10.5434 EUR
Sale                5,364              10.6276 EUR
Sale                1,620              10.6276 EUR
Sale                760,495            10.5434 EUR
Sale                383,424            10.5434 EUR
Sale                96,090             10.5100 EUR
Sale                500                10.5800 EUR
Sale                385                10.4531 EUR
Sale                87,157             10.5735 EUR
Sale                9,261              10.8000 EUR
Sale                45,627             10.5668 EUR
Sale                767                10.7900 EUR
Sale                333                10.6277 EUR
Sale                5,222              10.5100 EUR
Sale                2,500              10.7100 EUR
Sale                633                10.7300 EUR
Sale                2,756              Transfer
Sale                39,339             10.6972 EUR
Sale                78,671             10.5668 EUR
Sale                1,602              10.4200 EUR
Sale                235,029            10.5434 EUR
Sale                330                10.6278 EUR
Sale                25,661             10.5431 EUR
Sale                53                 10.6273 EUR
Sale                13,759             10.5429 EUR
Sale                28                 10.6293 EUR
Sale                14,959             10.5429 EUR
Sale                31                 10.6279 EUR
Sale                89                 8.4251
Sale                549                10.6276 EUR
Sale                156,578            10.5433 EUR
Sale                502                10.6276 EUR
Sale                469                10.6276 EUR
Sale                49,388             10.7075 EUR
Sale                694                10.6276 EUR
Sale                325,566            10.5434 EUR
Sale                285,635            10.5531 EUR
Sale                3,022,740          10.5100 EUR
Sale                3,926              10.7075 EUR
Sale                20,175             10.5100 EUR
Sale                126,590            10.5433 EUR
Sale                268                10.6277 EUR
Sale                257,427            10.5434 EUR
Sale                140,886            10.5433 EUR
Sale                76,061             10.5432 EUR
Sale                160                10.6279 EUR
Sale                49,787             10.5432 EUR
Sale                105                10.6279 EUR
Sale                72,523             10.5432 EUR
Sale                153                10.6278 EUR
Sale                56,392             10.5432 EUR
Sale                118                10.6280 EUR
Sale                224                10.6277 EUR
Sale                156,128            10.5433 EUR
Sale                1,702              10.6045 EUR
Sale                219,588            10.5434 EUR
Sale                298                10.6277 EUR
Sale                154                10.6279 EUR
Sale                73,336             10.5432 EUR
Sale                137,122            10.5433 EUR
Sale                291                10.6277 EUR
Sale                38,784             10.5723 EUR
Sale                26,722             10.5430 EUR
Sale                55                 10.6278 EUR
Sale                5,579              10.6045 EUR
Sale                1,726              10.5100 EUR
Sale                106,095            10.5432 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          87157         10.5735
CFD            Long          500           10.58
CFD            Short         68302         10.5376
CFD            Short         533401        10.55
Swap           Short         1             25

(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                         24 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   260,000                9.7500           EURO           19/12/2008
Option            Purchased   -2,000,000             21.0000          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   1,000,000              15.0000          EURO           19/06/2009
Option            Purchased   1,000,000              14.0000          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   600,000                12.5000          AMER           19/12/2008
Option            Purchased   500,000                16.0000          AMER           18/12/2009
Option            Purchased   500,000                16.0000          AMER           18/09/2009
Option            Purchased   500,000                14.0000          EURO           18/12/2009
Option            Purchased   500,000                12.0000          AMER           19/12/2008
Option            Purchased   500,000                10.5000          AMER           19/12/2008
Option            Purchased   20,000                 12.0000          EURO           18/12/2009
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                10.0000          AMER           19/12/2008
Option            Purchased   -5,000                 12.0000          EURO           19/06/2009
Option            Purchased   410,000                10.5210          EURO           29/09/2008
Option            Purchased   -5,000                 9.5000           EURO           19/12/2008
Option            Purchased   -2,500                 14.0000          EURO           19/12/2008
Option            Purchased   19,900                 13.0400          EURO           03/10/2008
Option            Purchased   215,285                9.2900           EURO           20/04/2009
Option            Purchased   250,000                10.5000          AMER           19/12/2008
Option            Purchased   -1,000,000             12.0000          EURO           18/12/2009
Option            Purchased   120,000                10.5000          EURO           19/06/2009
Option            Purchased   -192,806               9.9600           EURO           19/12/2008
Option            Purchased   -1,500,000             10.0000          EURO           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   -260,000               10.5000          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   -500,000               12.0000          AMER           19/12/2008
Option            Purchased   10,000,000             14.5400          EURO           23/02/2010
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             14.0000          EURO           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   -1,000,000             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   -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


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