By Jailene Cuevas Kate Middleton announced that she has been diagnosed with cancer on Friday and a friend of the royal has said the speech was “all her”. A friend of the Royal Family revealed that Kate wrote the speech by herself “very quickly”. Kate also thought a video message would be more reassuring than a written statement. The friend told The Sunday Times: “It wasn’t really about the drama of the last few weeks, though obviously that has been upsetting. She felt she had to do it because of who she is. It was more that she knows she is a public figure and has a wider leadership responsibi…