pitot/static icing
Lemain #234.
Surely that is a non-starter ?
Have you looked at Fig 1 of the AAIB report, illustrating the fine weather and no low cloud prevailing ?
Why that aircraft and no others ? Why should the system be frozen when the aircraft is downwind on a summer's afternoon but not cause concern on the high-level cruise ?
Have you carried out the crew-room punditry to determine at what altitude what combination of pitot or static blockage would have turned the observed speed at threshold of 150 kts to the 108 kts you suppose the pilot would have been reading ? I am not up to that sort of calculation. A blockage at 20,000 ft or so on the descent ?