Strikes by London Underground workers have gone ahead from Friday evening after last-ditch talks failed to resolve a pay dispute.Members of the Rail, Maritime and Transport union (RMT) will walk out throughout the next week, causing huge disruption to services.

Strikes by London Underground workers have gone ahead from Friday evening after last-ditch talks failed to resolve a pay dispute.Members of the Rail, Maritime and Transport union (RMT) will walk out throughout the next week, causing huge disruption to services.