Can someone explain in simple words how this all works? I've exchanged vouchers for other things but not for Virgin flights. Say for example I want to fly from UK to USA. The going rate is £2.50 = 625 miles. I have £55, which gives me 15,625 miles.
How do you find out what that means in terms of value? Does it vary depending on the route? If you don't have enough value in Clubcard vouchers do you just top up with cash? Is it instant (unlikely!!) or are there several steps in the process?