The air tanker for TCX did not get reconfigured per se. It got the basic MT seats but no premium cabin. This is why there were questions about its use on the new MAN-SEA route as the product probably wasn't the best choice for a (new) west coast USA route, with no Y+ cabin to book. The second AircTanker didn't even have PVT's.
https://www.thomascookairlines.com/e...r-airlines.jsp
As for the Jet2 one, it's a short haul configured aircraft, apart from the seat colours, there was little difference form the standard air tanker config anyway.