My initial comment would be that the tail-booms on Whirlwinds can be swapped around, so I wouldn't believe 100% that it is XJ729 down there.
Whereabouts 'in the nose' does it say XP395?
There are plenty of photos of 'XJ729' which is now flying as G-BVGE - simply enter G-BVGE into your search engine and follow the links.