Hilico: It is not only in Harwich. I used to fly EMS in the North West and was pelted with snowballs by a group of kids just outside Skelmersdale (Skumersdale to those in the know!). Balls of snow and ice do not mix well with Bo105s during takeoff! And yes, Merseyside has the only hospital landing site that has an official warning about vandals: again I know from firsthand experience, having had to land there several times!