This begs the question, are the Merlins in the BBMF Packard Merlins or RR Merlins?
The Lancaster, Hurricanes, MkII, MkV and MkIX Spitfires should all have RR Merlins, the MkXVI should be a Packard.
Ciderman, best to your mate as well. I seem to recall his next outing in a Hurricane, a tech problem during the display led to a very hurried and skilled landing; happily with a much better outcome for him, the aeroplane and the heart rates of those of us watching!