The direct charter flights to MLE are very good in "premium" on Thomson / Okish on Monarch (similar to Prem. economy I would suggest, and an easy direct way of getting to MLE).
Jumbo driver posted that two BA767-300Er's become available from LHR at the end of the sumer.... I don't know enough about Max-take-off weights- or Runway length / hot operating at MLE but a 777 IGW is much larger than a 767...
Re: LGW- NCL flights, the slots are now operated by flybe, so little reason why BA would look at these again... Flybe flights often available thro' AIRMILES for 750 miles...