Don't know why people think TCX would drop an airframe, most of the new routes are not served by TCX anyway and it actually increased ACE this year in place of Tunisia and Sharm and their holidays are selling really well. They have added a flight to Almeria for next year as well.
The airlines obviously know what they are doing and they know that ALC, PMI etc are a licence to print money and as long as the folk of the north east want it they will keep operating them.
Easyjet have said they are pleased with the base on more than one occassion so cannot see them pulling out anytime soon either.