Why would they do that when TUI is almost as big as Jet2 and have more wide body departures.
Because TUI isn't as big - and some of their widebody flying arrives after the first outbound wave of departures has gone, so can use the same stands - as the shorthaul 787 goes out, the long-haul one arrives 30 minutes later from SFB/CUN/PUJ - you get the idea. If you look at this purely from a stand utilisation point, it could fit well.