Nick
I understand Zenon are still looking for guys and that if Jet2 is the place for you then there are opportunities to go permanent at the end of the contract.
That said, be prepared for being self-employed through a third party umbrella company and T's & C's that are 'woolly' at best. And if you want out early for a better deal elsewhere, there are undisclosed training fees whether you are rated on type and may only need OPC and a few Line Training sectors or not