There is a bit more discussion on this topic over on E-Goat:
http://www.e-goat.co.uk/forums/showthread.php?t=281
and again:
http://www.e-goat.co.uk/forums/showthread.php?t=1032
For what it's worth, many of the contributers on e-goat don't get flying pay and have first hand experience of covering the last fire strike.