Sentebale has filed a defamation lawsuit against Harry Windsor and Mark Dyer in the London High Court following a public leadership rift.The legal action stems from a dispute with chairwoman Sophie Chandauka that prompted the resignations of Harry and Seeiso Lesotho last March.An inquiry by the Charity Commission cleared Harry of bullying allegations but reprimanded both sides for damaging the charity's reputation.Sentebale is currently struggling with a financial crisis as reserves plummeted from one point five million pounds to near insolvency.