RMT General Secretary Mick Lynch insists his union's strategy of strike action is "working" but hopes the operating rail companies can "change their attitude" over working practices. Mr Lynch speaks as he joins workers on a rainy picket line at central London's Euston station as a walkout by 20,000 members across the country cripples train services. Report by Blairm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn