Thanks Geoff.
I'm not too worried re the Oxfordshire/Berkshire bit so just rrying to find the right birth reg and then the right parents:
The Abingdon one looks to be ruled out:
RG11 Piece 126 Folio 39 Page 7
Name: George H Evans
Age (Original): 32
Gender: Male
Birth Year: 1849
Birthplace: Abingdon, Berkshire, England
Relationship to Head of Household: Head
Marital Status: Married
Occupation: Coffee House Keeper
Address: 14 Poland St
Event Place: St James Westminster, Middlesex, England
Household Role Gender Age Birthplace
George H Evans Head M 32 Abingdon, Berkshire, England
Mary Evans Wife F 26 Deptford, Kent, England
Ellen Evans Daughter F 11 Newcross, Kent, England
George Evans Son M 7 Battersea, Surrey, England
Thomas Evans Son M 6 Westminster, Middlesex, England
Mary Evans Daughter F 4 Westminster, Middlesex, England
Francis Evans Son M 0 Battersea, Surrey, England
Bertha Davison Servant F 16 Marlborough, Wiltshire, England
Dave