The British Manufacturing & Research is rather complicated - the following is from Wikipedia, so normal caveats apply (that said, there are Hansard records which essentially verify it) -
"One of the arrangements came to light in 1995, regarding a company called BMARC. Previously owned by the Swiss arms manufacturer, Oerlikon, it was sold to the British Astra Holdings in May 1988. Apparently, Oerlikon continued as a partner in some transactions.
Astra executives and non-executive directors were well-connected to the British defense industry. It was not always clear, to the Government, if a project was being managed by BMARC, Astra, or, outside the UK, Oerlikon. “No one has yet mentioned that when the contract for that was signed the project was being handled by, and BMARC belonged to, Oerlikon, which is a Swiss company. It was not until nearly two years after that contract was entered into that the new management of Astra, headed by Mr. James, bought BMARC and continued with that contract. By 1988 the intelligence community realised that Oerlikon—not a British company—was exporting arms via Singapore to Iran but it did not specifically mention BMARC. His misfortune was that his very successful company, Astra, made two unfortunate purchases—BMARC and the other company that supplied the Iraqi gun, PRB.”
Because of the apparent continued involvement of Oerlikon after the sale, this might explain the continued use of the BM monogram.
However, there is no listing for BM after the sale
@Fede - Fede, What is your source that “BMO” was being used by ROF until 2002? The reason I ask is that a 2013 publication shows the monogram still assigned to Astra Defence Holdings.
@EOD - Alex, “BMR” was RNAD (Royal Navy Armaments Depot) Broughton Moor, Cumbria 1939 - 1963, then leased to Germany until 1977, then US navy until 1981 and finally NATO until 1992.
“BMRC” should be accompanied by “GM” and together with “BMARC” were WWII onwards monograms.
@ron3350 - Ron, “V” is Förenade Fabriksverken, Sweden.