The other peculiarity of the Household Division is the Foot Guards Lance Corporal will wear two chevrons, a Corporal equivalent is termed a Lance Sergeant and wears three chevrons.
Thanks for the correction re Household Cavalry
Sloppy Link. My father was a lance sergeant in the Scots Guards, and I still have his tunic which dates from 1923, complete with its white chevrons.
I had a chum, now deceased, who had been a Conductor in the the Royal Army Ordnance Corps, (later the Royal Logistics Corps) who were at the time the most senior warrant officers in the British Army. This obviously rankled with the guards, so much so that in recent years they have invented the new appointment of Army Sergeant Major, whose holder takes precedence over conductors in the RLC.