Rail passengers have been warned to expect a weekend of travel chaos ahead of a major strike and planned engineering works. Staff from Avanti West Coast belonging to the Rail, Maritime and Transport union (RMT) will begin a series of walkouts this Sunday in a dispute over rest day working. Avanti, who operate services connecting major cities including London, Manchester, Glasgow and Edinburgh, have urged its customers to travel either side of January 12. The walkout marks the start of strike