Tui's website has always been a bit creaky, clunky and crap, but when you get to the payment page, after fannying about with all your details, only to be told they're having "technical issues" and the holiday hasn't been booked, it's beyond annoying. Their current issues/reputation will put people off booking, but making it nigh on impossible for would be customers to book easily will add to the speed of their demise. Never mind, I'll try Jet2.