If this is ok with @Richard.Dane I thought a thread could be useful where forum members recommend good secondhand record stores. Hopefully this could expand into a resource when visiting new locations. The Discogs app is very good, but a personal recommendation with added detail is always useful.
Starting off with a visit to Clocktower Music in Bridport. New & used vinyl, very well stocked, plus some vintage Hi-Fi too. No internet sales (out of choice), but they can do mail order. A system in place where all rare or good quality LPs are housed in re-sealable sleeves and labelled “Please ask to see condition” to protect the records from poor handling and keep them in good order - liked that. A very helpful and knowledgable owner too - highly recommended.