Great, mr sky scanner books his flight for £300 return and a £10 auction and gets bumped up to WTP.

I turn up at t-3 days trying to book the ticket for £2500 and find there's no availability (which often happens, I'm wait listed most of the time nowadays, even with lots of notice. Makes a mockery of flex tickets).

Even if I do get a seat or £2500, the cabin is full fog the sky scanner lot, and the leisure flyers on £600 return bid £100 to upgrade and get it.

How many CW upgrades will Ba have to sell to offsetting even one flex passenger flying elsewhere?