You lot are so mean... (almost as mean as those who pick on people who walk around the back of the plane in their First PJs, swilling champagne in cut glass flutes...

).
You can actually sit in Club for the price of WT+, you just have to burn some BA Miles to do it (most regular posters are no stranger to that...). So the answer to the OP is to start collecting BA Miles, then buy upgradeable WT+ fairs and upgrade to Club at the time of booking
Boo