the long shadow of a lock up

My Grandad had a lock up like this several streets away from the house. It was cool in the heat of summer and had a poster of Glamis castle in it. It smelled of Engine oil and i can remember the british leyland feel of the Austin Allegro - what a car. This one had front mounted machine guns and a rear facing mortar - we would veer across country aiming for the puddles taking out anyone who got too close or was going to too slow.