Freebmd and FindMyPast are also good at amending their errors 
Agree that FreeBMD is good but FindMyPast, while good at correcting minor transcription errors, is not so good at correcting some of the major howlers in their census transcriptions.
I've been trying to convince them that various streets and areas are in Glasgow, Lanarkshire, not in Lanark, Lanarkshire, that Stoer in the parish of Assynt is not in the County of Moray; and several other similar errors emanating from misunderstanding or mistranscriptions of the page headers.