So you've planned your journey and, as a belt and braces measure, you've checked the Highways Agency's Traffic Forecaster ( http://www.highways.gov.uk/jtdb/servlet/controller?dateStr=24-08-2008&timeStr=09am&area=CentralWest&date=24-08-2008&time=09am&go.x=13&go.y=9 and http://www.highways.gov.uk/jtdb/servlet/controller?dateStr=24-08-2008&timeStr=09am&area=CentralNorth&date=24-08-2008&time=09am&go.x=25&go.y=9 ) and confirmed that there ought to be no delays. WRONG! Two cooling towers, next to the Tinsley Viaduct, are to be demolished in the early hours of Sunday morning, causing the M1 to be shut until the Viaduct has been structurally examined to confirm that it hasn't suffered any damage. Although the Highways Agency records that this event is happening in their Newsroom ( http://www.highways.gov.uk/news/pressrelease.aspx?pressreleaseid=164764 ), for some reason it doesn't show on the Forecaster. If the structural inspection is going to be any more that just a cursory glance, I wouldn't be surprised if it runs into Monday at least. I thought that the Tinsley Viaduct was structurally unsound, anyway. Wasn't that why it was reduced from six lanes to four just after it was opened?