Westlands tested RA490 at RAF Merryfield in the early 1950s. It was a Meteor IV with F8 fin and small additional vertical fins on the tailplane; it was fitted with Rolls-Royce Nene engines and deflector vanes.
Although I don't remember seeing the aircraft itself, I certainly remember later exploring the test pits and tunnels over which it would be parked to do various tests.
All gone now, sadly....
As for RA490, sadly it ended its days on a fire dump.
No ejector seat, so the effect of a single engine failure at the 90 KIAS minimum speed at which it flew would have been....interesting.