....only a matter of time before a scheduled direct service from UK to CUN materialises, I reckon.
When I was there last year (travelled with AMM as was from LGW), our 763 shared the ramp on a Tues with 3 MYT a/c (2 330's and 763). There are also weekly BAL 763 and TCX 330.
My bet would be on VS with their "leisure" 744 fleet from LGW sometime in the next few years.