Thanks for the advice.

I have another (slightly more long-winded) question if anyone would be kind enough to help please...

If I have a FTV containing minimal avios/cash and 2 x 241 vouchers (only created for the purposes of extending voucher length), and I then use this FTV to book a long haul trip in a premium cabin using a substantial amounts of avios/cash, is this trip still fully refundable?

ie. Would my avios/cash be at risk due to using a FTV to part-pay for the booking if I later need to cancel, or could I still get a full refund (minus cancellation fees) like a normal avios booking?

Many thanks