Out of interest, didn't they use some Canberras for cloud sampling too?
.. indeed they were.
Some years ago I was involved at RAF Aldergrove/BIA with the selling/leasing of some more MoD land to the airport. Talking to an aged Irish fireman about various sorts of contamination, he recalled when the sampling Canberras returned there (23 MU there was the Canberra MU) for "decontamination".
"And how exactly did you do that?" sez I
"Sure we just towed 'em onto the grass yonder, and just hosed 'em down!"