There are various theories on the Twitter thread but the favourite seems to be a combination of the acceleration lifting the nose of the disco combined with tyre to tyre contact. Basically he drove up the back wheel of the little red hatch.
As for NI LR indies, the only one I know is on College Lands Rd near Moy. Can't give you a rec cos I've never used them. But I drive past there a lot and there's always a shedload of RR and Discos outside.
44 quid at Screwfix, I still have the page open.
https://www.screwfix.com/c/electrical-lighting/cable/cat8960001#category=cat8960001&cablelength=10_m&conductorarea=10_mm_
I knew I had a bag of F-plugs somewhere. I went straight to where I thought they were and there they were. This is such an unusual occurrence I thought I'd mention it.