Surely it's a wind-up. That flight should have been about 7½ tonnes below MTOW for that sector, and the 2332m runway at Newcastle with the smallest engines and a hot day should have allowed very close to MTOW takeoff.
If the plane was completely full of pax, it should still have been 2.7 tonnes below ZFW, leaving weight for 7,000 cans of beer; almost enough for a Glasgow-London flight.
What am I missing? Was it carrying fuel for the return flight as well? Is it April 1st? Was NCL runway partly closed?