<sod >It is feared no one on board either aircraft survived the crash Both aircraft involved had taken off from Wycombe Air Park, which is 16 miles to the south east of the estate, and were flying at low altitude.< eod>< sod > It is feared no one on board either aircraft survived the crash Police have accessed the woods and set up a cordon around where the two aircraft came down Photos from the scene show police tents have been set up where the two planes came down Fire engines and police were seen at the entrance to the estate as crash investigators took over A Cessna 152 took off from Wycombe Air Park around the same time as the helicopter.< eod>