Conisholme / Fen Farm wind park, Lincolnshire, England
Incident period: 4 January 2009; enquiries and interim findings in January–February 2009
A damaged wind turbine and reports of unusual lights produced one of Britain’s most memorable UFO headlines. The detached blade was found on the ground, engineers began examining the machine, and a later assessment pointed towards fatigue in its securing bolts. The case is worth following through that whole sequence: the early uncertainty, the local concern and what the investigation actually changed.
The damaged machine
On 4 January 2009, a turbine at the Conisholme wind park was found with one twenty-metre blade detached and another damaged. The machine was one of twenty at a site operated by Ecotricity which had begun operating the previous spring.
The damage was immediately visible and substantial. A missing blade in a photograph did not mean the material had vanished: contemporary reporting of the operator’s statement said it had been found beneath the turbine. Parts could therefore be examined rather than reconstructed solely from witness recollections.
The incident happened in the Lincolnshire countryside near Conisholme and Louth. The wind park is also referred to as Fen Farm. Those names describe the same case context, rather than two separate turbine incidents.
Reports from the sky
Residents described lights around the period of the damage. UPI’s 8 January coverage named councillor Robert Palmer among those who had noticed an unusual light, recording his description of bright white with an orange border.
Other accounts connected lights moving towards the wind park with the damaged turbine. The timing and the striking photographs made a collision seem an attractive narrative. The story spread rapidly through the national press and specialist UFO discussion.
A reported light and a broken machine were two observations whose connection still needed to be established. The early operator statements treated the cause as under investigation. They did not identify a recovered aircraft part or a witnessed impact with the turbine.
Recovering and examining the material
The Irish Examiner’s contemporary account recorded an engineer working at the site and the operator declining to speculate about a final cause. Its clarification that the detached blade lay below the turbine is a useful correction to the idea of an inexplicably absent component.
By 13 January, the energy publication edie reported parts being sent for forensic testing. It also relayed the company’s statement that the turbine, fallen blade and surrounding ground had been examined, with further material testing under way.
This moved the enquiry from the appearance of the wreckage towards its failure sequence. An examination could ask whether one part had broken first and damaged another, and whether the material carried evidence of an outside collision.
The operator’s position develops
Ecotricity’s statement of 15 January described rebuilding, including replacement blades and a hub. The list of possibilities still included material, design, maintenance and weather-related mechanisms. Collision had been considered too.
The same statement said the examination had not found evidence supporting a collision, such as foreign debris or transferred material. It proposed that the falling blade might have struck the second blade. The company also made clear that a UFO was at the bottom of its probability list.
That statement belongs to an intermediate stage. It is more informative than preserving only an early refusal to rule anything out, while it still precedes the February discussion of the bolts. The original operator statement is available in the archived copy linked below.
The council’s recorded response
Local concern also reached East Lindsey District Council. A public question at the council meeting of 21 January asked about safety, consultation and publication of investigation findings. The question and response survive in the minutes included in the council’s March document pack.
The response identified the Health and Safety Executive as the enforcing body and described the council’s initial involvement. It said preliminary information required fuller analysis, and that turbines of the same type had been checked by factory-trained personnel before operation resumed.
The damaged components were to be replaced and the site remained restricted while work continued. These records show a practical safety response alongside the much more colourful UFO publicity. They do not identify a visiting object.
The February findings
On 10 February, BBC reporting described investigators excluding a collision with a UFO or other aircraft. Dale Vince explained that the ring of securing bolts showed the characteristics associated with fatigue and that attention was turning to the components on either side of them.
This was still an investigation into the underlying mechanical cause. The account distinguished the observed failure at the bolts from the question of what had imposed the stresses. A short summary saying merely that a bolt snapped loses that distinction.
Edie’s follow-up on 11 February likewise reported fatigue as the leading explanation in the manufacturer’s interim work. The sources read here do not include the complete manufacturer’s final engineering dossier. The article therefore identifies these as the published interim findings and contemporary explanations.
Why the Ministry did not open a UFO investigation
The Ministry of Defence was asked about the story. The National Archives’ later release guide records its position: media coverage had brought it to attention, but no substantive physical evidence of an aircraft collision had been supplied.
The Ministry did not intend to investigate unless such evidence appeared. Its response belonged to its airspace-defence remit, while the damaged turbine was already receiving an engineering and safety investigation through other organisations.
There were consequently two different official questions. One concerned a possible aircraft entering or threatening airspace; the other concerned why a large mechanical structure had failed. The existence of an active enquiry into the turbine did not mean the Ministry was secretly investigating a recovered UFO.
What remains useful about the case
The history changed considerably over five weeks. Initial uncertainty encouraged speculation; examination of recovered material then supplied a more definite mechanical direction. The reported lights retained a separate observational history, without a demonstrated role in the failure.
That development is part of the case’s interest. It shows how a visually dramatic incident can acquire a UFO identity very quickly and how later technical information can be less widely remembered than the first photographs and headlines.
The map marks Conisholme broadly. It is a locality reference for the wind-park story, not a public access point or the exact position of the damaged machine. The council’s contemporary record explicitly describes private land and controlled access during the work. The linked sources let readers follow the incident from public concern into the published investigation rather than stopping at its opening mystery.
Timeline
4 January 2009: the turbine is found with a detached blade and further damage.
8 January: national reporting links the damage with reported lights; the operator confirms an investigation.
13–15 January: material testing and rebuilding are reported; the operator says collision evidence has not emerged.
21 January: East Lindsey Council records a public safety question and its response.
10–11 February: published interim findings focus on fatigue-related bolt behaviour.
2013: archive-release guidance records the Ministry’s decision not to investigate without substantive aircraft-collision evidence.
Sources & further reading
UPI, Locals blame wind turbine damage on UFO, 8 January 2009 — Contemporary reporting of Palmer’s light observation and the early uncertainty.
Irish Examiner, Turbine damage generates UFO rumours, 8 January 2009 — Contemporary operator statements, including the recovery of the detached blade.
edie, Damaged turbine sparks UFO theories, 13 January 2009 — Testing, site examination and the operator’s then-current safety statement.
Ecotricity, Close encounters of the turbine, 15 January 2009 — Original operator statement read in a preserved Internet Archive capture; covers rebuilding and the then-current absence of collision evidence.
East Lindsey Council, 21 January 2009 public question and answer, printed page 11 in the March pack — Primary local-government account of the investigation, component checks and access restrictions.
BBC News, Turbine damage not down to UFO, 10 February 2009, preserved reprint — The February explanation attributed to Dale Vince; the source is a reprint of BBC reporting.
edie, Aliens cleared of turbine sabotage, 11 February 2009 — Contemporary follow-up on the manufacturer’s interim fatigue findings.
The National Archives, UFO highlights guide 2013, wind-turbine section — The Ministry’s recorded position on the absence of substantive aircraft-collision evidence.
Related case files
Howden Moor, 1997: the air-crash search, the sonic booms and the military records
Charlton, 1963: the crater, the meteorite claim and the official investigation
Location note: Broad Conisholme village reference for the wind-park case, not the exact damaged turbine or an access point onto private land.
UKPX historical case file. Researched and checked 4 November 2026. Explore the UK case map · Links & Sources.