Colin,
Yes, as Pete has already said it was not my model, thank goodness.
However, having not seen the crash in real time (just the immediate after effects) I was keen to see if there were any lessons to be learnt. I did have a chat with the pilot afterwards and he couldn't understand what had happened and explained that he had previously had 30 uneventful flights with it. However, another person who had seen the crash chipped in and said he thought that one of the flaps might not have retracted properly but any video of the event would show this, hence my request for Phil to post the video to review it.
The flying is limited to four models in the air at any one time at most Jet meets (sometime only three at any one time) but this is not the issue. It is all the other Txs switched on in the pits etc as turbine models take a lot of setting up and trouble shooting if something is not quite working correctly and with probably 50+ models there was a fair chance quite a few Txs were switched on at any one time. My limited understanding is that as most of the more modern Txs will be frequency hopping they tend to take up quite a bit of the allocated spectrum and as DSM2 does not frequency hop it can (in extreme circumstances) momentarily suffer from loss of uncorrupted signal causing a failsafe.