His birth index:

First name(s) Alexander Lucy
Last name Prescott
Birth year 1969
Birth day 18
Birth month 4
Place ZURICH
Country Switzerland
Mother's last name Channon
Volume C (Consular)
Page 3104
Record source GRO Births Abroad Indices (1966 to 1978)
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No Marriage found for the above name.

But I have found that sometimes people have written Alexander for Alexandra and a search for this produces this marriage index at 29 years later:

First name(s) ALEXANDRA L
Last name PRESCOTT
Marriage quarter 2
Marriage year 1998
Registration month 4
MarriageFinder™ ALEXANDRA L PRESCOTT married
Benjamin C Alexander
Spouse's last name Alexander
District Cambridge
District number 331
County Cambridgeshire
Country England
Page 0475
Entry number 081
Source code C30
Record set England & Wales Marriages 1837-2008

It might be interesting to get the marriage certificate and see who the father was.
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