Her birth index:

First name(s)         Susan C
Last name             Pares
Birth quarter         1
Birth year            1941
Mother's maiden name  Fletcher
District              West Ashford
County                Kent
Country               England
Volume                2A
Page                  2606
Record set            England & Wales Births 1837-2006
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There are three marriages of Susan Pares, one of which was a Susan C Pares and was in 1972, in Folkestone and to one John M Gray and looks very much to be hers, so I’ve gone for it.
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Gray is a not uncommon name, though Pares is uncommon.  This means a search for Gray births with a mother’s maiden name of Pares, from 1972 to 1992, migh just have a rogue entry.  But here’s the three and they are all in much the same area, so I believe they are the one family:

Last name   First name(s)        Year Of Birth  Location
Gray        Jonathan Humphrey M  1974           Epping, Essex, England
Gray        Theresa Margarita    1976           Ashford, Kent, England
Gray        Anna Dorothy         1978           Ashford, Kent, England
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Their marriage index:

First name(s)       Susan C
Last name           Pares
Marriage quarter    3
Marriage year       1972
Marriage Finder     Susan C Pares married one of these people
                    John M Gray
Spouse's last name  Gray
District            Folkestone
County              Kent
Country             England
Volume              5F
Page number         1294
Record set          England & Wales Marriages 1837-2005
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