lauriebe,
From your link:
Royal Air Force Heraldry Trust, the Squadron Badges List
it would suggest that 84 Sqn should have the word 'Bomber' incorporated in the Sqn badge. The badge issued by the College of Arms dated April 1946 and approved by HM King George VI does not have 'Bomber' in it. I would suggest that that link is not the definitive list of RAF Sqn badges.