Thomson left because of Peel only being able to see locos and nothing else, then there's the fact that all charter operators cut back to the major hubs.
Things may well have changed now but prior to the sale farce a seemingly more focused Peel were hoping to get them back for Summer 13.
If the demand wasn't there we wouldn't have had a seasonal based charter carrier for 8 months let alone 8 years or whatever it was.