Agreed alex, there's no doubt this cannot be an XP-62, if any other differentiation fails: Compare the gear covers.
It's XP-60C S/N 42-79424, period.
And Radoye's plane is one of the fascinating testbeds. I love them.
In particular the depicted plane is a Folland FO.108 (also known as Folland 43/37 according to the Air Ministry Specification also known as Folland Frightful or Folland Frightener (the latter was used when nearly half of the planes crashed during test flights)).
The plane was used as an engine testbed for the british aircraft industry in WW2, supporting engines with an output range up to 3000hp.
12 airframes have been built, the one shown here is P1775 equipped with a Bristol Hercules VIII with a power of 1550hp.
It was planned to be a testbed for the Bristol Hercules III high altitude engine planned to power the Vickers Wellington Mk.V, this engine was developed into the Bristol Hercules VIII and was later cancelled completely. P1775 then was allegedly converted to a Bristol Centaurus and test-flown with that engine between August 1943 and July 1944, but this is undocumented.
The next known fact about it is that it has crashed on 18 September 1944 and got disbanded three days later, therefore it has been scrapped.
Best regards - Mike