. Whirly
Your father's name is not immediately obvious to me but, there could be several reasons for this. First he could have been on short-term (ad hoc) assignment to Ferranti, or he could perhaps have joined after Ferranti became BCalH. Alternatively your father might have been flying for one of the other operators ex-Cranfield, such as Trent, who I believe bought one of the Ferranti 206's.
Either way, any memorabilia, stories and alike shall be warmly welcome.
If your father has any interesting stories from his time with Metpol we'd love to hear about that too!
Best
Sav