Hi there
the graves in Bethesda Chapel Blackpool were exhumed in Feb 1973 and moved to Layton Cemetery in Blackpool. Ancestry.com has a record of the graves exhumed. I have just found this looking for the grave of Enoch Read who died in 1975 and was buried there. Bethesda Chapel was demolished and the land including area formerly its graveyard is now the Doreen Holt Playground.
Kind regards
Angelo