bob
Well, that's quite an interesting proposition, isn't it? There are undoubtedly benefits to be had for students, by doubling-up on lessons and going in the back on other people's flights. However, that's not the issue is it, I would say that as long as the third person in the back makes no additional payment to be there, then it's legal, but I'm sure you'll get some more expert opinions than mine shortly. That still leaves you with the business problem of convincing your customers that you're not ripping them off though. By the way, if you end up with two students in the aircraft and the FTO is charging more for that, do they plan to pay you any extra?