Traffic is building on the southbound carriageway between junction 24 for Nottingham/A50 and Junction 25 for the A52 Brian Clough Way.
The deays are taking place due to a large pothold repair.
A slip road was also shut for Junction 25 spouthbound for more than two hours from 4.30am.
Highways England tweeted at 5.30am: “#M1 Southbound #J25 – J24A and we are installing a Lane 1 closure on the main carriageway and a lane 1 closure on the southbound entry slip for a large pothole that needs repairing.”
The slip entry was reopened ar around 7am – but one lane between the two junction is still closed.
Meanwhile, the northbound carriageway remains open to traffic.
This is a breaking story. More to follow…