WW, at school, as a 13 year old, we were lined up outside the house on the road each morning, were inspected, and then had to run up the hill and down again.
Every day I was pulled up be the house master, an ex-major in the Parachute Regiment, for mud on my black shoes. The 'mud' was a dark mud-coloured band of neoprene in the heel composition. He accepted what I told him but continued to pull me up every morning, trying to tell me something but I never twigged
put me off the Army though.