Someone who lives near LHR can test drive the A380
Fly from London Heathrow to Paris by A380 this summer for £80 return
and take advantage of the BA sale in France:

WT+ sale


Biz Seat and Biz Bed sale

Someone from the US who wants to get to both London and Paris can do it the other way around:
https://www.flyopenskies.com/home/en_us