@Mawkie thanks !
Just wondering if shoes are used more or boots ( only one pair is allowed to order )
Do you have tips as to what items needs preference?
For example : don't order item A as it's not practical, order more of item B as it helps in winter blah blah blah
At the moment, I have just ordered equal number of each item ( based of max qty that we can order )
Most of this is personal preference. Do you prefer long sleeve shirts or short? Polos or proper collared? Jumpers or cardigans?
Some CSAs like short trousers in the summer, as the station security walks can be gruelling in 35C. And long trousers in the winter. I don't feel much difference between the summer long trousers and the winter ones, except the winter ones have extra side pockets, which is useful.
Almost nobody wears the "formal jacket", but if that's your vibe, then go for it.
Gilet is useful, but not everyone likes them.
Everyone moans about the coats and the fleece lining, but let's say they are adequate.
I'm not sure what shoes they are doing lately (suppliers change regularly), but the last pair I got were Magnums, which were very comfortable. I don't see much benefit in boots for a CSA as you won't often, if ever, be doing track walks. If you look down next time you're in a station you'll see staff often wear their own shoes for comfort purposes - often black trainers, which is not permitted, but mostly overlooked.
Surprisingly, gate lines (and stations) can be absolutely freezing in winter - especially if you are there for a couple of hours or more, so I often wore jeans and t-shirts under my uniform to keep warm!
Of course, lots of this depends on where you'll end up. Outdoor stations in the sticks will require you to be outside more than most central London stations (for security checks, call point checks, platform de-icing etc).
Sounds like you've made good choices having a little of everything. There's plenty of pics online if you wanted to see the uniform, or indeed, just walk into any station and see what people are wearing.