In reply to gammarus:
I got all our family kit from decathlon and vinted.
Vinted: Under £100 for 4 ski jackets. 1 X decathlon, 2 X animal, 1 X protest. Sallopettes for £20 for one child
Decathlon for other sallopettes so they could be tried on. Not great, as no ventilation on them, but ok for a few days.
If you are happy with your sizing, then vinted had some real bargains.
Post edited at 08:56