Road users are advised that the southbound M1 between junctions 4 and 2 will be reduced from two lanes to one overnight tonight (Tuesday 19 April) as work continues to repair the motorway following the huge damage caused by a fire underneath the road on Friday.
http://nds.coi.gov.uk//content/detail.aspx?NewsAreaId=2&ReleaseID=419252&SubjectId=12
seen at 22:12, 19 April in National Audit Office News - national.