Thought I'd double-check before I make a booking for next year (returning before end of August):
Thinking about booking a WT+ return (using the 20% off voucher) and then UUA to CW. If we decide not to travel in the end, will I get a voucher for the entire cash value plus the Avios used to upgrade, or do I need to disassemble (i.e. undo the UUA) first, presumably at a cost of £70?