A quick update, just been on the blower to DM himself, and he assures me that it is the P.24 Monarch that is pictured and at the FAAM Reserve.
The ’16’ look to it is down to shared exhauts outlets and stubs etc.
He also says that the original prop sets are with the collection aswel, so would be nice to see them all reunited and displayed one day.
Banupa, Dave at the FAA Museum would also be very interested in hearing about your time at Hayes and the resto work involved with this engine, please PM for contact details or follow the links on the FAAM website.

It’s a fine looking powerplant, especially for one so complex!