That money will go toward restoring old aircraft, right?
Given the price of UK aircraft fuel and landing fees at most airports It probably won't even cover the flying costs.
Fuel consumption seems to be around 150 Imperial gallons per hour at a cruise height leaned out, and up to 400 Imperial gallons per hour at more power lower down -
http://www.plane-design.com/documentation/lancaster/lancastermanual.pdf
That money won't last long...:^)