What should have been addressed, but as far as I know has never been discussed is the shockingly long time that Boscombe Down took to get the icing clearance for the machine.. .Evidently the tests had been done successfully some time before (at least a year), but the report wasn't completed, so the operational people were not allowed to use the capability to fly in icing.. .No-one seems to have commented on this aspect of this very unfortunate crash.