the poor chap may have considered a turn back to the IOW but the weather down here on Saturday afternoon was vile in extremis with squalls and 45 mph gusts along the coast from Dorset to Hants/IOW.
we do not know if he had an IR but just a look out of the window that day and any private flyer surely would have not gone anywhere...
i drove past Bournemouth airport in the afternoon and the viz was hopeless
if you were in a VFR situation flying a small plane it would be horrid
just watched 2 interesting programs this week
one about the Hampden that went down on Dartmoor returning from bombing submarine pens and the eagle rock HRH duke of Kent sunderland crash - both in 1942
both poor viz and low level flight