I seem to remember a wire detector developed for the Puma and trialled on the OCU that consisted of a ring of warning lights, they detected the current flowing through the wires, all went well flying towards wires on the tests and detecting them, however I seem to remember as they were leaving the grid cut the juice and yup you guessed right.
The Chinook, from RAF Odiham in Hampshire, landed in a field near Llangynin, Carmarthenshire, after striking power lines and causing a power cut in the village.
The incident is thought to have happened during a flight to Devon.
Funny routing to Devon