London's Most Dangerous Drug?

Tina, yabba, crank, ice - these are all the street names for the drug, methamphetamine or crystal meth. Crystal meth is a synthetic stimulant which can be cooked up at home using a range of easily available household products and cold medicines. The drug caused paranoia, delusions, violent behaviour, depression and suicidal tendencies. America is in the grip of a crystal meth epidemic but what about London? The London programme visits Tennessee to witness the terrible effects of crystal meth, talks to experts about their fears for London and finds out how easy it is to get crystal on the streets of the capital.