A terror of frozen peas, a fear of barns and a dread of kneecaps have emerged as some of Britain's most unusual phobias. Britain's weirdest phobias include a fear of peas and kneecaps. While spiders and heights are common sources of anxiety, many people's lives are blighted by phobias of seemingly innocuous objects. David Allison, a therapist based at Addenbrooke's hospital, in Cambridge, was filmed treating some of the worst sufferers in an ITV1 documentary to be shown next week. They included Sue Williams, 37, from Dudley in the West Midlands, who is so terrified of knees that she has...