"It's clearly relevant that his forces should attack our forces carrying out humanitarian tasks in the no-fly zone, " said Mr Hoon.

BBC: Forces chief issues strike warning

The court heard that Mr George had an IQ of 75, in the lowest 5% of the population, and scored in the bottom 1% for tests of memory, planning and carrying out tasks.

BBC: Profile: Barry George

Although computer usage has not been conclusively shown to cause permanent damage to healthy eyes, there is evidence to suggest that small vision defects, which do not cause symptoms in everyday life, may start to cause problems when carrying out more visually demanding tasks.

BBC: Computer eye tests

The strain of dealing with a volatile public often means workers have difficulty carrying out routine tasks or become too afraid of assaults to continue in their jobs.

BBC: Stress: The effects