I would hope that the north weald crash would make the yak 52 pilots very carefull about CCT entry via the R+B it is not some thing to do when you have the rest of the pilots expecting standard CCT,s to be flown.
Most light aircraft pilots have no idea how the R+B works and so do not know where best look to avoid such trafic this cuts down the "efective lookout effort" in the CCT and leaves the pilot flying the R+B with the sole set of 100% efective eyes and in practical terms 100% responsability to avoid ALL other trafic.
I have strong views on this subject as a mate of mine was killed in the above crash and would have hoped that the practice of R+B CCT entry would have stopped when other aircraft are in the CCT.