By gemma.gardner@iliffemedia.co.uk (Gemma Gardner) Motorists are being advised to check before they travel following a multi-vehicle collision on the M11. A lane is closed in both directions near Great Chesterford which is causing around two miles of congestion. There are currently delays of 30 minutes southbound and 15 minutes northbound, according to National Highways. The closures are in place between junction 10 and junction nine, with National Highways traffic officers on their way to the scene.