Ah yes, Petrolhead, that Mk3. 1981 I think? Interesting that as the ventral touched and its fuel plumed out, our friend hit the reheats (well, you would, wouldn't you?), and the reheats lit the fuel...
A fact which, years later, caused me to go into battle to insist that reheats were a likely ignition source in the Concorde take-off accident at CDG.
The Lightning landed safely, however, with a very cooked lower fuselage that took many moons to re-skin and sort out. Happy days.