Just with reference to parked aircraft at CWL and St Athan.
At CWL there is about 12 747 aircraft parked around the site and it was up to 14 at one point. They are definitely maximising the space there.
As for St Athan it is a busy site for Ecube with lots of aircraft parked around to be scrapped.
In the tweet below they do mention what they're doing at the airport during this crisis.