At the suggestion of the archives, I phoned Gloucester cemeteries archives and they found him:
Tredworth Cemetery burial no. 1214 grave B1511
Buried 14 Nov 1922, last address High St, city of Gloucester.
Officiating minister C W Janvrin (who is listed for quite a few records - the archivist suggested he was possibly the minister for the mental hospital)
Thanks everyone for reading my request.
Added: just searched on this cemetery and it is Tredworth Road cemetery, sometimes known as Gloucester Old Cemetery.