The BBC has announced that Mabel, one of the longest-serving Blue Peter pets, has died. Mabel, who was the first rescue dog to become a regular fixture on the show, retired from the programme in March 2010 after 14 years of broadcasting. Blue Peter presenters paid tribute to Mabel, sayig she had lived a “long and happy life”. For photos and film footage, see  www.bbc.co.uk/news/entertainment-arts-13284549