Hopefully someone else can help you there with the geography.
Bapts;
St Peter, Chertsey
WILLAIM Fairbrother 29 Oct 1746, Father William
ANNE Fairbrother 28 May 1749, Father William
THOMAS Fairbrother 16 Jan 1757, Parents William/Sarah**
Burials same Church;
WILLIAM Fairbrother 27 May 1760 child of William (no age given)
SARAH Fairbrother 02 Nov 1799 ( no age or status given)
Not much help I'm sorry but if that is your Sarah she would be 91 in 1799 (if her burial) and aged 49 when having Thomas in 1757.
All info above from FreeREG
Trish 
Thanks for this, I’ve just re-read it and realise I was getting confused over the 1799 burial of Sarah. I’d previously found the 1799 burial in Chertsey of Sarah Light, who it had turned out was certainly not the wife of John Light. However, your Sarah Fairbrother buried in the same year looks like a quite possible burial for her.
Dave
