Could anyone possibly tell me about this uniform?

[plaid preacher]

Not so. Up until the end of WW II all Other Ranks of the British Army were encouraged to carry a "swagger stick", when walking out in No1 Uniform. Carrying one discouraged slovenliness. Carrying a stick with a silver top makes a man swagger which leads him to walk in a more upright military way. It also stopped him putting his hands in his pockets.

Chas, most interesting. They just yelled at us when we put our hands in our pockets. That seemed to work too.