One that's slipped well under the radar is a reissue of
The Devil's Men from a company called Poseidon Films Ltd. I never got the DD or US disc and I remember little about it than it not being that great but their site lists it as 16:9 , whereas the DD was 4:3 apparently.
The Devil's men [DVD]: Amazon.co.uk: Peter Cushing, Donald Pleasance, Kostas Karagiannis: Film & TV Poseidon Films | Our Work | The Devil’s Men
They're also based at Hammer House no less..