In reply to Dave Perry:
I stand corrected
I've emailed them asking what happens to a winter course if there is no snow
This is the response I've got :
'In the worst case scenario and there were no suitable conditions, we would cancel the course and offer you a full refund or to transfer you on to an alternate date or course, whichever you preferred'
I think that's as fair as it gets so have booked the last week of February and the first week of March with them. Can't wait now