Don Homuth wrote:

-snip-

One of the Pommy bombers used four RR Merlins, if memory serves. A
friend who was at an airshow there said That was quite the experience.

Both the Halifax and the Lancaster used Merlins - though the
approximately 2000 Halifax Mk. IIIs and 300 Lancaster Mk.IIs used
Hercules radial engines instead of the Merlin inlines.

I think there's but two airworthy Lancasters remaining - one with the
Battle of Britain Memorial Flight in England (though the Lancaster
entered service long after the BoB was over - but heh, close enough!)
and the other with the Canadian War Plane Heritage group in Ontario, Canada.

Don't think there are any airworthy Halifaxes remaining so it was likely
one of the Lancasters.

Peace and justice,