Hi Barbara and Welcome to RootsChat!
I'm not really into WW2 but I did find this ..... don't know if it's much help but every little bit is a baby step forward!!

I can't find a camp of that name in Chester !
212 (13th West Lancashire) Battery at Aigburth Liverpool
conversion of 354 Fd Battery - renumbered ca. July 1938 as 212 (27th West Lancashire) Battery
Annie
PS If by any chance you know any names of his officers - this may help! - if you can trace the officers - sometimes you can trace the men!!
http://www.unithistories.com/officers/1AirbDiv_officersC.htm