It's quite likely that it's the same person, yes.
There's also
this 1993 Monty jets off to Australia article (on page 10):
Chelmsford Traffic Inspector "Monty" Montgomery is clocking up a few miles following his retirement at the end of last month. He jetted off with his wife on September 15 to spend six months in Australia, visiting Malaya and Borneo en route, the latter for a three day trek by canoe followed by three days hunting in the jungle. Former colleagues from traffic and firearms joined Monty for a function at Lawn Lane community centre in Chelmsford to mark his retirement after 30 years' service. Insp Montgomery served for 17 years as a firearms officer, at Pc, Sergeant and Inspector level. He was firearms commander at the White House Farm massacre, where Jeremy Bamber had murdered five members of his family. He also directed the firearms observations following two armed raids at Frinton which led to the shooting of Pc Bill Bishop in 1984, and was operationally involved in the Ramsey siege in 1979 which resulted in an armed youth, Paul Howe, being shot by the police. During his service he carried out a firearms study in Australia, and attended an FBI course in America.
Another item: When
Dc Steve Myall joined Essex Police over 30 years ago little did he realise that he would be involved in one of the most notorious cases in our history. Steve was one of the first officers at White House Farm, Tolleshunt D'Arcy after the murder of five members of one family. Much later in his career, he volunteered to go to Rwanda to investigate the mass genocide. Expecting to stay a few months he ended up there for over three years, a sacrifice for a home-loving man. Steve is not retiring completely, he has joined the MOD Police.