Home Office Minister Chris Philp says that the current legislation surrounding nitrous oxide, commmonly known laughing gas, "isn't working" and "is the cause of a great deal of anti-social behaviour". Philp speaks about the government's plan to tackle this, and that "tougher measures are needed". Report by Rowlandi. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn