History of the Flight
The pilot, a 58-year-old private pilot with 148 hours total experience on type, planned a local flight from Shoreham Airfield to the Brighton Marina and return. He requested taxi instructions at 1518 UTC and was cleared for takeoff on Runway 21 at 1524 UTC. Air traffic control (ATC) advised that visibility was 3,000 metres in moderate rain, which the pilot acknowledged, stating the flight would last 15 minutes.
At approximately 600 feet, while commencing a left turn, the pilot encountered rapidly deteriorating conditions and informed ATC of his intention to return immediately. ATC lost sight of the aircraft and provided vectors using very high frequency direction finding (VDF) equipment. The pilot reported being downwind but unable to see well; ATC instructed turns to avoid high ground. At 1531 UTC, the pilot declared he was lost. ATC coordinated with the Distress and Diversion cell at LATCC, instructing a climb to 2,000 feet for a position fix. The pilot became disorientated and made concerned transmissions. Shortly after, the aircraft broke out of cloud base at about 500 feet over open fields. The pilot decided to land immediately; the aircraft landed in a sloping field and came to rest inverted. The pilot extricated himself from the wreckage. A police helicopter located the pilot walking in a field and landed to assist.
Local Terrain
Shoreham Airfield is at 7 feet amsl on the English south coast. The South Downs lie near the northern boundary. The accident site was approximately 3.5 nm northeast of Runway 21 threshold, at about 400 feet amsl. Higher ground exists nearby, including a spot height of 672 feet within 1.5 nm and 813 feet further east. An illuminated mast at 863 feet amsl is 3 nm on final approach to Runway 21. The Minimum Sector Altitude northeast of Shoreham is 2,100 feet.
Meteorological Conditions
The meteorological forecast for southern England indicated an occluded front moving southeast at 10 kt, with general visibility 25 km in occasional rain, 5/8 cloud at 2,000 feet, and occasional reductions to 8 km visibility with 3-6/8 cloud at 1,000 feet. Isolated areas, mainly northeast, were expected to have visibility 4,000 metres in rain and drizzle with 4-6/8 cloud at 500 feet. Strong southwesterly winds with gusts to 25 kt were warned.
The ATIS, acknowledged by the pilot, reported surface wind 230°/14 kt, visibility 6,000 metres in rain showers, cloud scattered at 1,600 feet, broken at 2,200 and 3,000 feet. ATC later updated visibility to 3,000 metres in moderate rain.
Air Traffic Control
Shoreham is in Class G airspace. VMC minima at or below 3,000 feet require in-flight visibility of 5 km (reduced to 1,500 metres for aircraft under 140 kt). However, a PPL without an IMC rating requires minimum visibility of 3,000 metres while in sight of the surface. The pilot held no IMC rating.
The VDF at Shoreham was operating for test purposes but considered accurate. ATC used VDF information to assist the pilot. The Manual of Air Traffic Services provides guidance for terrain clearance, advising controllers to consider terrain and advise climbs if doubt exists.
Supervision of Flying
The flight was authorised by the operations manager when weather was suitable. As the pilot walked to the aircraft, he spoke to a flying instructor who noted a crosswind of about 12 kt and that visibility in the circuit had reduced to an estimated 3,000-4,000 metres. The instructor did not know the pilot's qualifications but assumed he held an IMC rating. When weather deteriorated further and G-BTGR was taxiing, the instructor was surprised but took no action. ATC later inquired about the pilot's IMC qualification; examination of his licence revealed no IMC rating and his only instrument flying experience was during PPL training three years prior.
Summary
After flight authorisation, meteorological conditions deteriorated markedly below forecasts. The pilot received weather updates from the instructor and ATC but became airborne and encountered conditions beyond his capabilities.