A rail passenger was ordered by armed police to lie face-down on a platform in Dorset in a case of mistaken identity, police have admitted (link below.)
http://news.bbc.co.uk/1/hi/england/dorset/7493981.stm

The 21-year-old was detained by two officers after the train stopped at Bournemouth at 1800 BST on Saturday.

Dorset Police said Hampshire officers had told them of an earlier firearms incident in Basingstoke and the man was then identified by a BTP officer.

The Independent Police Complaints Commission has been told of the matter.

The force said a senior officer had also visited the man and his family, who live in Bournemouth, and that an apology had been issued.