Unless the rules have changed, the RAF will be glad to take anyone’s 30 pounds. If the request comes from someone other than the veteran himself or next-of-kin (as stated on a form that must be submitted), then the few pages released will be highly redacted.

I gambled once, ordering the file of an officer, F/Lt Edward Stanley, and I received a total of four pages, very heavily blacked out in key places, such as seen here in a scan of page one.

But your veteran’s purchase won’t have material redacted. It’s just that even for this ex-RAF gentleman — and you said he was RAF (not RCAF, where, if he was, his personnel file, maybe 200 or more pages thick, would be available for viewing/copying) — there won’t be very much bang for his buck. But there will be info that will be valuable to him.