Cheers for the replies,
A similar debate as 'will I wear my leathers today on my bike, even though its 25C?'
My flight suit only cost £20 from an army surplus shop, but although it is fire proof treated, I have been wared that it is far from heat resistant, and that for heat resistance I should wear thermals underneath. Less than ideal. Mind you, bet it doesn' look as silly as 3 people donning wetsuits at Popham for a cross cahnel flgiht in winter, then peeling them off at Le touquet such as I did a couple of years ago!
I would like to think that it woulmd give valuable seconds though and wouldnt catch fire itself.
Just read an horrific AAIB report of a plane landing safely, then swerving off the runway and bursting into flames. Pilot got 75%burns, managed to crawl out, pull his wife out, then died, horrible.