Cotswold church - Pen and watercolour study signed S G Trevor

Cotswold church- a well- executed pen and watercolour study signed S G Trevor, no date but I would put it at 1920/30’s era. It needs a gentle clean as it has been stored in grubby folder for many years. The size is 11 x 8 ½ inches. One of a number of unframed Cotswold pictures Henry had amassed.