Greetings to all

Just joined. Some of you know me. I am a researcher in Canada and was wondering if I could get some information on RAF service files. I understand that the UK privacy laws are more stringent than here in Canada but was wondering how often do the RAF service file contain photographs of the airman? In RCAF files, mostly Bomber Command, the average is about 75% of the time. The earlier in the war then that's where the photos are most often missing.
If any members have questions about RCAF Bomber Command service files don't hesitate to ask.
All the best