A man who launched an unprovoked knife attack on two strangers at a south London tube station has been jailed, following a British Transport Police (BTP) investigation. Nicholas Green, 36, was jailed for 11 years at Inner London Crown Court yesterday, with a further five years to be served on licence. The two victims had just left a local dance class when Green entered the station and subjected them to a frenzied and unprovoked attack. BTP officers began investigating immediately and arrested Gr