Signal failures causes disruption for Olympic workers

A large number of people working in and around the Olympic Stadium during the upcoming Games faced lengthy delays earlier today.

Security guards from G4S, as well as volunteers and other Games staff were all disrupted by signal failures and door problems on some of London's overground and underground trains.

The overland service between Richmond to Stratford was badly affected, while tube services on the Jubilee Line and Docklands Light Railway suffered problems.

Passengers using the Highbury & Islington station were informed by staff over a loudspeaker: "There are long delays and last-minute cancellations on the Stratford to Richmond route. We are trying to get some concrete information from the Overground control room, but so far we have been unsuccessful."

Transport chiefs are expected to investigate the matter, with the Games due to get underway on Friday.