Tony
As Hans-Karl states also , Dawson accept in his book that Legros existed and was killed at Waterloo but surely not on that place (he refers to SHDDT: Xb 561 : 1er régiment d'Infanterie Légère 18914 à 1815) - no one seems to know where he was on that moment. And he surely didn't break the gate with his axe, as the gate was open to receive the retreating British Guards. Furthermore, there weren't sappers in the 1st rgt LI and there were no axes at all in the depot of that regiment or issued to soldiers of that regiment.
Dawson even mentions that, knowing that the casualty reports don't mention the names of the killed in the courtyard, and that Captain George Evelyn of the British troops only mentions that French skirmishers pressed closer to the farm, while the gate was closed and barricaded, and on that moment was wounded through a hole in the door,
that it could be possible that the 1 rgt of Light Infantry was not involved in this affair, and that it wa-ere soldiers of the 3rd rgt LI who broke through the gates
Marc