Collins Guide to Cathedrals Abbeys and Priories   This is an excellent page that needs to be more widely linked in  I note that the basic source is Alec CliftonTaylor but would suggest that Henry Thorald provides a more complete gazetteer  For instance Thorald includes both Dale Abbey and Lastingham which this list omits  Thorald sets his criteria rather more widely than those for this list obviously he includes churches that are now cathedrals which would not be included  But he also includes   Former monastic churches in Wales  Former monastic churches now used for colleges and schools eg Milton Abbas Jesus College Cambridge  If I add in missing churches from Thoralds gazetteer should I continue with the two exclusions above  Milton for example has only been a school chapel since the s