Her birth is not found on FindMyPast or FreeBMD.  Her marriage certificate would give her age and father’s name.

No more information available for her publicly apart from the electoral roll in 2002.
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But could this be her from 1998:

First name(s)     Catherina Anna
Last name         Pharoah
Year              1998-2018
Street            Kean House 6 Kean Street
Town              London
County            London
Country           England
Postcode          WC2B 4AS
Age guide         65+
Address           Kean House 6 Kean Street, London, London, WC2B 4AS
District          Strand
Company director  Yes
Record set        Uk Electoral Registers & Companies House Directors 2002-2020
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Their marriage index:

First name(s)       TIMOTHY M
Last name           PHAROAH
Marriage quarter    4
Marriage year       1970
MarriageFinder      TIMOTHY M PHAROAH married one of these people
                    Catherina A Clater
Spouse's last name  Clater
District            Chelsea
County              London
Country             England
Volume              5A
Page number         1383
Record set          England & Wales Marriages 1837-2005
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