Minerva Fire Defence
of Twickenham
1969 EMI acquired Associated Fire Alarms, followed shortly thereafter by Minerva Fire Defence[1].
1970 The name of Associated Fire Alarms was changed to AFA-Minerva, so presumably Minerva Fire Defence became part of that group at that time.
1983 Derek Thwaites was appointed managing director of the EMI fire protection and security company AFA-Minerva[2]