Lamduan Armitage (née Seekanya) was a formerly unidentified woman whose body was discovered in 2004 on Pen-y-ghent, a mountain in Yorkshire, England, leading her to become known as the Lady of the Hills.

[7] On Monday 20 September 2004 at 11:30 am, a man walking in the vicinity of Pen-y-ghent alerted the police to the discovery of the body of a dead woman.

[9] Police investigated every sighting in the Yorkshire Dales of women matching the description of the unidentified body dating back to 1 August 2004.

[9] A postmortem examination suggested that the woman died between 31 August and 13 September, but did not provide enough information to enable investigators to establish the cause of death.

[4] Analysis of the body indicated that the woman had been in the UK for at least two years prior to her death and that she had probably lived in Cumbria, Lancashire, or the west Yorkshire Dales.

[4] In December 2004 the police produced an e-fit photograph of the woman, which was issued to the embassies of a number of Asian countries.

[13] In May 2007 the inquest heard that the investigation found no evidence of trauma, assault, or drowning, and it recorded an open verdict.

[21] On 19 March 2019, North Yorkshire Police revealed that they had identified the body, following DNA testing,[6] as Lamduan Armitage (née Seekanya).

[25] David Armitage was first arrested on 23 January 2025 by Thai authorities at his residence in Kanchanaburi province, Thailand, in connection with her death.

[7] The North Yorkshire Police stated that the "61-year-old man has been arrested on suspicion of the murder of Lamduan Armitage in 2004".