If your T/O still says its a no go for flights to Mexico...You can do it your self...I have just work mine out for two adults and one child..But i am sure you can work your own out simple enough...
Right Flights to Orlando from E/Midlands..Approx £300 or less return each Eco class..
Flight from Orlando to Cancun $265 return
All inclusive at the Catalonia I have work this out for the three of us and it comes out at £1.178.94
So the total cost for me works out at around £2278.94
So my total cost Not including transfer fees comes out at £2278 for the tree of us...And that works out FAR CHEAPER than the T/O..
That is travailing with Thomson's to Orlando but you will have to stay over night at Orlando as the flight get in late in the afternoon and the flight from Orlando Is at 1430 hours(with A/A airlines)(the one i have chosen )But with some more surfing i am sure you can find some thing deferent with (Expidea)or another airline..
So at the end of the day with some more surfing it will work out a lot cheaper doing it your self to get to Mexico....But the inconvenience of changing at Orlando come in to operation if you wont to bother with it all...Chris