Also TCX, or 'MT' should I refer to them from now on, are well ahead of the game with long-haul available for Summer 2017. They look to be sticking with July and August only with 3x weekly Orlando-Intl, 2x weekly Las Vegas and 1x weekly Cancun.
Actually Thomas Cook are operating an even more expanded long-haul programme than this if you check their booking engine. There are flights now ex Stansted over the major school holidays including the May half term week to Orlando.
Orlando is also
up to 10x weekly during the peak school holidays in July/August some days offering two flights operated either by HiFly or Air Tanker.
This is a huge increase for an airport which had no long-haul leisure connections just a couple of years ago.