The AA traffic update service also shows a half-mile stretch of the carriageway experiencing delays because of the problem. Meanwhile, restrictions are in place on the southbound M1 at junction 16 where flooding is affecting all the ramps. RAIL FLOODING: London Midland cancels ALL trains between Rugby and Milton Keynes FLOOD ALERTS: Number of rivers in Northamptonshire could overflow after heavy rain SEVERE WEATHER WARNING: Flooding causing travel chaos in Northamptonshire after a night of torrential rain