Just for information , we were on the flight back to Newcastle and both the flight out and back were delayed nearly 6 hours. My friend who was on the flight out was in correspondence with Jet2 claiming compensation and was getting nowhere. He eventually contacted a company called Bott and Co who took over his claim . He told me about this company so I contacted them and they agreed having checked the flight stats that we should be eligible for compensation , all I had to provide was our names and passport numbers. This was about 8 weeks ago and today we received an email to say that Jet2 have agreed to pay the compensation which I think is in the region of 600 euros each. The claim company take around 30% which I think is quite fair given the input I made.
The flight references were LS561 and LS562.