As an example of the secrecy still surrounding RPFs, an recent-ish attempt get a document relating to Lancaster/Lincoln ops during the late 1940s declassified was rebuffed by the MoD on the grounds that it contained operational details and thus could be of assistance to a hostile power.
The idea that details of the conduct of a 1948 Lincoln sortie, with a single chap down the back twiddling his WW2-vintage receiver as the aircraft plodded along over the Baltic, could in any way compromise Rivet Joint operations seems fairly ludicrous to me, but there you are.
One unfortunate result of the unnecessary secrecy is that a lot of the participants in those operations won't get the wider recognition they deserve (at least, as Yellow Sun notes, probably not in their lifetimes).