All this means is instead of TCX paying a lot of money to sub-charter the route they have decided to come under an agreement with WW to be able to sell seats on their flights.
WW do not have IFE on their flights, and i doubt we will see any extra a/c at CWL unless on a W pattern as WW have no extra aircraft on order and unless another base us underperforming on on many routes. The only other option for IFE is if a mainline aircraft is brought in to operate the route on behalf of WW.
If we do see extra FAO etc it will be at the expence of another route.