If you want accurate traffic information based on radar you should ask for a RIS. The very reason RAF controlers don't tell you are identified is because a FIS is (and I quote) 'a non-radar service
Nothing to stop him giving 'non-radar' traffic information if he feels it might aid the aircrafts safety because of the proximity. It's called providing a
service to the
customer 
"avoiding action hard right turn multiple departures from XXXX remain clear of XXXX airspace". This was after initial call requesting FIS and MATZ penetration. He may have been squawking 7000 and may have been the only such traffic around but it sounded like panic to me.
Ouch! Panic is probably the nicest thing you can call it. He gives a turn to an aircraft, not positively identified,not on a radar service, without knowing whether the aircraft captain is qualified to take that turn that could possibly have put him IMC.
Wants b
y shooting if you ask me
