Insider claims: Princess Kate responded to blackmail attempt with cancer video. Kensington Palace was contacted about Kate's diagnosis and had no choice but to share the news with the world themselves.

Staff at the exclusive London Clinic are said to have attempted to access Kate Middleton's private medical records. According to a Daily Mail source, Kensington palace was then blackmailed - and had to react. Princess Kate, who was suffering from cancer, had to pre-empt publication with her video - otherwise her cancer diagnosis might have become public in another way.