Jetairfly 767
They dont have seat back IFE, but they do provide IFE from overhead Monitors or you cant rent an IPAD for an additional fee (Economy Class),
In their own product (which is not necessarily the same one Thomson will use on these sub charters) they offer handheld IPADS to Premium/Comfort Class customers.
For exactly what Thomson/First Choice intend to offer as onboard product on the Jetairfly operated flights, you will ofcourse need to speak to their (Thomson) Customer Services folks.