Based on the 'Chester' postmark there is an 'Old Rectory' care home (Google maps CH1 6HN) quite near to Chester, can't locate any lookalike farms though. There is a fairly new estate 'Manorfarm Crescent, nearby but as yet not been able to find what might have been there. Out of interest, can anyone work out what the book is?
I have come across this
Manor Farm but I think there are too many differences, unless there have been extensive alterations since 1949. I've also a feeling, since petrol rationing was still in force, it's a bit far from Chester.