Hi Bob,
John Henry Maynard had been dreadfully wounded by shrapnel, he survived for another seven months, dying on 9 Nov 1941.
Richard Beacon, Stanley Richard Hudders and my uncle David (Dave) Chalmers were killed outright. Stanley Hudders is buried with Dave in the same grave in Beckenham Cemetery - plot no. H3 row 1. Dave & Stanley's grave is next to John (Jack) Maynard's. Richard Beacon is buried in Sittingbourne (ref: Pat Manning).
There are also housing blocks named after the fireman casualties. Chalmers House is in Border Crescent, SE 26 and Hudders House is in Churchfield Road (ref. Beckenham's 30 Glorious Years 1935-65 by Pat Manning). The signs are circular, with a black background, gold lettering, an oak tree in the centre also picked out in gold - Pat Manning kindly emailed me a photograph of Dave's.
Chris