I'm friends with someone in our village who used to be a 757 captain with Thomas Cook until February, and is now with the new start-up.
Apparently, the airline has its own AOC and is planning to start operations now on the 24th May after the
PR department handed its schedule down from 24th April to the 12th May to 24th May.
Its because of difficulties in doing final checks and getting the new interiors and exteriors on the airline's two Boeing 757s that are ex-MyTravel (?) which are apparently at Lasham or Manston he forgets which, but in the meantime MYT are carrying out the airline's schedules from LGW and I think MAN.
Hope it helps!