None of this makes any sense.
Anyone who steals a car with any real value never takes it for a joyride... it either gets parked up (to see if it's got a tracker) or put in a container (to fool said tracker and wait until nobodys looking for it). A car like that is going to stick out like a sore thumb, especially as it has no plates which will immediately get a reaction from any ANPR-equipped car.
These guys can't be opportunists if the car wasn't in a running condition, and the UK is not the place where you can just pay your way out of anything.
Secondly, apparently the car only has a 20L fuel tank. No petrol station in the UK will let a car fill without a number plate, and while it is possible to pull over and refuel from a can... whats the point? I doubt they stole it while they had the fuel with them, so there'd probably be a car travelling on convoy. In which case... why not just tow the thing?
Also... what real value does this car even have? Some parts (body kit, some engine parts) could probably have some resale value in a far away market, but it'd be harsh to shift all the parts being custom etc. Much easier to steal a BMW or something and ship it off to Eastern Europe...
Lastly... they did at least strip it partially which suggests that they had some plan (rather than just joyride), but all the seem to of taken off are the lights and wing? Neither parts are really worth anything - stolen BMW / Mercs get stripped down to the shell that night, so by the next morning they've got nothing but the cube of the shell weighed in for scrap and a load of parts going out... I can't believe someone who put in this much effort would do nothing of any real damage to the car.
I can't help but think this is all some elaborate stunt...