An overturned vehicle has blocked three lanes of the M1 motorway at Markfield. The accident happened on the southbound carriageway close to junction 22 at around 9.45am this morning. The Highways Agency said the road is expected to remain blocked until around 10.45am. A spokesperson warned motorists that queues were building between junction 23 and 22. UPDATE: Road was cleared at around 10.10am.