What happened
During the landing phase of the flight, the pilot chose to land into a surface wind of 280° at approximately 6 to 8 knots. The landing took place on an open field characterized by moist grass and a terrain profile that rose toward a crest before sloping downward.
While the initial touchdown was performed normally, the aircraft was unable to decelerate sufficiently before reaching the edge of the field. The aircraft subsequently collided with a dry stone wall and a perimeter hedge.
Findings
An assessment of the event suggests that the pilot's estimation of braking performance was inaccurate. The primary factor in the collision was the overestimation of braking effectiveness given the combination of the downward slope and the damp condition of the grass surface.