It should be made a legal requirement that a plaque be erected, detailing the history of a site, whenever a listed building is demolished. A plaque would save many people, interested in architectural history, from wasting hours searching for buildings, now demolished, mentioned in Pevsner's The Buildings of England guides.
I was a pupil at the Durnford Street School, Middleton, in the Metropolitan Borough of Rochdale. The school building was listed Grade II*, and now most of the school has been demolished. Durnford Street School was described and illustrated in the South Lancashire volume of Pevsner's guides.
Marjorie Kay, Blackley, Manchester