Tempest JN814 23.5.44 crashed on test where?

A bit of Googling turned this up. I give no warranty as to its accuracy, but it seems to rule it out as a candidate.

23 May 44 JN814 force landed and turned over; S/L Phillips seriously injured (Napier test pilot). Airframe retained by Napiers as instructional airframe 4829M

http://www.rafcommands.com/forum/showthread.php?460-Hawker-Tempests/page3

Moggy