The aircraft returned to a private airfield at Powerscourt after a local flight lasting approximately 30 minutes. During the final stages of the approach, the Pilot initiated a go-around on a runway with a steep up-slope. During the go-around, the left wing of the aircraft struck a tree beyond the far end of this runway. Following a series of subsequent ground impacts the aircraft came to rest in an inverted position in a field adjacent to the airfield. Post-impact, a fuel-fed fire immediately occurred. The Passenger was fatally injured and the Pilot subsequently died of his injuries.