SIR - Boris Johnson’s continuing and deplorable disregard for acceptable standards in public life pales into insignificance when compared with his antics in a recent video showing him dressed in a camouflage jacked and about to throw a (dummy) hand grenade.

As a private of the Buffs, I trained with live hand grenades: I have been in a throwing bay with shivering recruits holding a grenade with the pin out hoping to God they wouldn’t t drop it. I have seen those same recruits fearing for their lives and while waiting their turn to throw complete the soldier's will in their pay books.

But what ever their fears not one refused to enter the throwing bay when their turn came. This because for any self respecting 18-year-old showing cowardice in the face of the enemy far outweighed the fear of possible death or injury. They were Britain at its best and quite the opposite of our soon to be ex-Prime Minister.

Brian Holmans, Langley Road, Bingley