Pobjoy pilots will tell you they neeed two hours engine tinkering for every hour in the air.
As little as that?? It takes that long just to pre-lubricate the rockers for each flight! 😉
The Super Wot though looks like a lovely aeroplane, although according to G-INFO it hasn’t had a permit to fly this year. Might I suggest that the owner is taking it somewhere to receive a little TLC? Hopefully we’ll see it in the air sometime soon.