Well rumours on the NCL thread is that after summer winter 2019 TCX wont have any aircraft at Newcastle in S20 and its got people saying a deal with Jet2 who would provide the flights for TCX but who knows.
I don't know which is more unlikely, this or the new bases rumour.
When the Holidays arm were getting into the groove a few years back, TCX and TUI responded by pulling Jet2 brochures from the shelves. Now that Jet2 has overtaken TCX to the #2 ATOL position, why would they want to help them back up? If anything the removal would spell a great opportunity for Jet2 to stick another 1 or 2 planes into NCL and finish them off for good