[Jon]

Thanks Graham thats the chap, and yes i remember now it was a Stirling.

Also on the subject of the .303 being only a light weapon, remember 4 together in a tight group with the high rate of fire the Browning had could put a great deal of lead in the air in a very short burst. If a Nightfighter or friendly bomber for that matter was close in and got a volley from a rear turret it would certainly recieve some serious damage...again it all depends on what where and to who the damage happens.
The Luftwaffe Airgunners in 1940 during the Battle of Britain themselves put up a great fight and, that was with a hand held gimble mounted single MG15, with magazine feed and only 75 rounds per mag !! For those of you with the superb bible of a book "The Battle of Britain Then and Now" have a sacn through the RAF losses and look for RAF fighters either shot down by defensive or damaged and had to withdraw from combat due to defensive fire from this weapon....you will be surprised at the high number.