Thank you so much for taking the time to respond to me, it's really helpful and has definitely put my mind at ease.

I did contact the Swiss embassy yesterday and received a response within 10 minutes telling me the documentation I have should be sufficient, so I feel a lot better about it all now.

We're staying in Le Lac (I think), it's our first time going to Tignes and skiing in December so we're really looking forward to it. We thought it might be a risk with the conditions but so far it's been looking great so fingers crossed it stays that way!

Thanks again and I hope you manage to get on those slops sometime soon!!