Protesters 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. Campaign group Insulate Britain claimed 79 people attempted to block the London orbital motorway hours after their release from police custody following similar protests earlier this week. Insulate Britain said they demanded “credible action” from the UK government “to insulate all the homes of this country” to cut carbon emissions. Transport Secretary Grant Shapps called their action “dangerous and counterproductive.” “We all agree that climate change must be tackled, but this sort of behaviour achieves nothing, puts drivers at risk, and increases pollution. I expect the police to take swift action to clear the roads,” he said on Twitter. Insulate Britain members blocked five junctions of the M25 on …