Climate alteration protesters person blocked immoderate M25 junctions demanding authorities enactment connected location insulation.
There person been protests astatine junctions 20 for Kings Langley, Herts, 14 for Heathrow terminal four, 3 for Swanley successful Kent, six for Godstone, Surrey and 31 for Lakeside, Essex.
Police said much than 30 radical had been arrested for highways obstruction.
Protest radical Insulate Britain said enactment would spell connected until a "meaningful commitment" was made.
It tweeted it was "disrupting the M25" to "demand the authorities insulate Britain".
Hertfordshire Police said 18 radical were arrested aft officers were called to a protestation adjacent junction 20 astatine astir 08:00 BST.
Supt Adam Willmot said: "Protesters ignored constabulary requests to determination location, truthful we took robust enactment to alteration roads to beryllium reopened and to region the protesters causing obstructions."
The unit closed the gaffe roads successful some directions, which led to "congestion and delays connected some the M25 and the A41", but the closures had lifted by 10:20 BST.
Essex Police said 12 radical were arrested aft it was called to reports that a fig of radical were blocking the roadworthy adjacent junction 31 conscionable earlier 08:15 BST.
It said officers worked to resoluteness the concern "quickly and safely", which included shutting the gaffe road.
Ch Insp Paul Austin said the enactment caused "significant disruption" and thanked drivers for their "patience and understanding."
National Highways said the exit gaffe roadworthy to Heathrow terminal 4 had been closed and Surrey Police said it was called conscionable earlier 08:00 BST to a protestation astatine junction six, wherever the gaffe roadworthy had been closed with a diversion acceptable up.
Surrey Police tweeted that a fig of radical had been arrested pursuing protests astatine junctions six and 14.
A fig of radical person been arrested pursuing protests astatine J6 +14 M25 8am today. Protesters from Insulate Britain portion of a coordinated protestation besides affected different m/way junctions. Diversions acceptable up+working hard to reopen m/way but delight program journeys accordingly this morning.— Surrey Police (@SurreyPolice) September 13, 2021
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Kent Police said it was called astatine 08:10 BST to a radical of radical obstructing the roundabout astatine junction three, wherever the B1273 and the M25 meet.
It said officers were "engaging with the individuals involved".
No arrests person been reported there.
Police forces person advised motorists to usage alternate routes.
Highways England said constabulary forces were taking the pb astatine each determination but it was apt to tweet details to roadworthy users arsenic it got much information.
In a connection connected its website, Insulate Britain said that Monday's disruption was "just the start".
"Actions volition proceed until the authorities makes a meaningful committedness to insulate Britain's 29 cardinal leaky homes, immoderate of the oldest and astir vigor inefficient successful Europe," it said.
It added that its demands were delivered by manus to 10 Downing Street connected 21 August, but truthful acold no-one successful authorities had responded.
Supporter Liam Norton, 36, from London, said helium was "shocked astatine the deficiency of important action" from the government.
"It's a no-brainer. Insulating Britain volition trim emissions, supply hundreds of thousands of jobs and halt our aged dying successful acold homes each winter," helium said.
"So halt messing about, Boris, and get connected with the job.
"As soon arsenic a connection is made that we tin spot and is meaningful, we volition get disconnected the roads."
The BBC has approached the Department for Business, Energy and Industrial Strategy for comment.
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