For some, who need the ending of a funeral, I'd recommend the Co-op.
60-ish years ago I remember my mum being subtly harassed by a commercial undertaker (in Romford), pointing out the special oak coffins, the lining, the carving, (but never a mention of the price). She of course found it hard to say Beggar Off.
Then years later my bosses body was flown back from Spain where he'd died of a heart attack (thousands the flight cost), and then when I saw his coffin pre-cremation is was another five grand's worth - oak again, intricately carved, lined, etc. - and it was about to go into the furnace (or not, as you always suspect the beggars of making off with it for future use).
My mum was finally laid to rest in the 1990s. She had a chipboard job from the Co-op. And no-one raised an eyebrow, no-one said "Tut tut, wouldn't an oak coffin by more suitable." I know what my mum would have said. The money saved was given away, as she would have done.
A