EXHIBIT 10.7
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THIS  SUPPLEMENTAL  DEED OF  GUARANTEE  is made this 17th day of January 2001 by
DATAWATCH  EUROPE LTD a company  registered  under the laws of England and Wales
under  company  number  02887429  with its  principal  place of  business at The
Software Centre, East Way, Lee Mill Industrial Estate, Ivybridge,  Plymouth PL21
9PE (the  "Guarantor")  in favour of SILICON VALLEY BANK a California  chartered
bank,  with its principal  place of business at 3003 Tasman Drive,  Santa Clara,
California 95054 USA (the "Bank")

WHEREAS:

(A)      This Deed is  supplemental  to the Deed of Guarantee  dated 27 December
         1999 and made between the same parties as this Deed (the "Principal
         Deed").

(B)      At the request of (inter  alia) the  Guarantor,  the Bank has agreed to
         vary the terms of the Loan  Agreements  (as  defined  in the  Principal
         Deed) and the  Guarantor  has agreed to vary the terms of the Principal
         Deed in manner hereafter appearing.

WITNESSES as follows:

1.       INTERPRETATION

1.1      In this Deed words and expressions defined in the Principal Deed shall
         have the same meanings herein.

1.2      "Effective Date" means 29 December 2000.

2.       AMENDMENT

2.1      As from the Effective Date the Principal Deed shall be amended by the
         deletion of Clause 1(i) and substitution of the following:-

         "(i)     the  expression  the "Loan  Agreements"  means the Amended and
                  Restated Loan and Security  Agreement dated 16 March 1999 made
                  between the Bank and the Principal  and Personics  Corporation
                  as amended by the Loan  Modification  Agreement  dated of even
                  date herewith and made between  Datawatch  Corporation and the
                  Bank and the Export-Import Loan and Security Agreement of even
                  date herewith made between (inter alia) the Bank and Datawatch
                  Corporation  as each of them may be  amended,  renewed  and/or
                  restated from time to time."

2.2      Save as amended by Clause 2.1 above, all the terms of the Principal
         Deed shall remain in full force and effect.



3.       MISCELLANEOUS

         Where the context  admits the  provisions  of Clause 1 of the Principal
         Deed  (Interpretation) and the provisions of Clause 22 of the Principal
         Deed (Law and  Jurisdiction)  shall apply  (mutatis  mutandis)  to this
         Deed.

IN WITNESS  whereof this Deed has been  executed as a deed and  delivered by the
parties hereto on the day and year first before written.


EXECUTED AND DELIVERED as a Deed by
DATAWATCH EUROPE LTD acting by:-


 /s/  Bruce R. Gardner
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Director

 /s/  John F. Cave
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Director/Secretary


EXECUTED AND DELIVERED as a Deed by
SILICON VALLEY BANK by:-


 /s/ Maggie Garcia                                         .
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A person authorised under the laws of
Californiato execute and deliver a
document as a deed