Sir Cliff Richard believes the broadcasting of a police raid at his Berkshire home in 2014 was the result of ‘illegal collusion.’ The operation - broadcast live by BBC News - came after allegations that the Christian singer had sexually abused children. The Crown Prosecution Service dropped the case last week, saying there was insufficient evidence to prosecute. The BBC has apologised for any distress caused and South Yorkshire Police apologised over its handling of the investigation. Sir Cliff is considering taking legal action, ‘There must have been illegal collusion. I've never known investigations take place with lighting and cameras and special angles for the helicopter. I feel I have every right to sue for gross intrusion of my privacy.’