Marc,
See Mike Robinson's The Battle of Quatre Bras 1815. Page 336.
When the British Guards Division arrived on the edge of the battle field they halted.
The NCO's then checked each man had untied a bundle of 10 rounds of ammunition and their flints were in good order.
Then they were called to attention, loaded their muskets and then fixed bayonets.
Then the light companies entered the wood [Bois de Bossu].
Paul