UK NewsProtesters Block UK’s Busiest Motorway for Third Time in a WeekSaveMark Us Preferred on GooglePrintHighways England workers on the exit slip road of the M25 motorway near Leatherhead after protestors blocked the road and left paint on it, on Sept. 17, 2021. PAAlexander Zhang9/17/2021|Updated: 9/17/2021Protesters demanding government action on home insulation have blocked Britain’s busiest motorway for a third time this week.At least three junctions on the M25 were targeted on Friday morning. Surrey Police said officers had arrested 14 people at junction nine.We had a problem loading this article. Please enable javascript or use a different browser. If the issue persists, please visit our help center.