Prof David Last, from Llanfairfechan, Conwy, died when the Cessna ... flight to try and work out what went wrong. The search focused on an area around Puffin Island, off the east coast of Anglesey ...

The longest of all happened to be undertaken by that most humble of aircraft, the Cessna 172. From December ... to reduce carbon build-up over the long duration flight, but the engine suffered ...