![Rail, Maritime and Transport union members on the picket line outside Euston station in London on Saturday. PA](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/3Y63ZNGH7RRHAILLI5UFVNJY4Q.jpg?smart=true&auth=1a59adec4e56b5bb5fe9b6f4731f29daac30b3c1173288802bba93f623b27051&width=400&height=225)
Rail, Maritime and Transport union members on the picket line outside Euston station in London on Saturday. PA
Rail, Maritime and Transport union members on the picket line outside Euston station in London on Saturday. PA
Rail union leader wants special summit to halt industry 'chaos'
Call comes as strikes hamper services on weekend of Eurovision Song Contest in Liverpool