Climate group Insulate Britain has suspended its road-blocking protests.

The organisation – which has caused misery for drivers with protesters sitting on the M25 motorway and other major roads – said it will stop its “campaign of civil resistance” until October 25.

In a letter to Boris Johnson, the group wrote: “Insulate Britain would like to take this opportunity to profoundly acknowledge the disruption caused over the past five weeks.

“We cannot imagine undertaking such acts in normal circumstances. But the dire reality of our situation has to be faced.

Insulate Britain protests
The statement came a day after protesters clashed with furious motorists who were being held up by their actions (Insulate Britain/PA)

“We invite you to make a meaningful statement that we can trust… that your Government will take the lead needed to insulate and retrofit our homes.”

Insulate Britain supporter Biff Whipster, a retail worker from Canterbury, unsuccessfully attempted to deliver the letter to Downing Street.

He told the PA news agency the group wants to “give the Government a bit of breathing space”.

But he added it will “recommence blocking roads” unless there is a “trustworthy statement from Mr Johnson about what actions he’s taking”.

Transport Secretary Grant Shapps said: “Sitting on roads and preventing everyone else from going about their lawful business is downright dangerous and counterproductive.

Insulate Britain protester
A member of Insulate Britain attempts to hand in a letter for Prime Minister Boris Johnson at 10 Downing Street (Aaron Chown/PA

“Rather than apologising to the motorist now and returning in a week-and-a-half, they must call off their reckless campaign forever.”

Insulate Britain – an offshoot of Extinction Rebellion – wants the Government to insulate all UK homes by 2030 to cut carbon emissions.

It has blocked roads on 14 days over the past five weeks, with activists often gluing their hands to the carriageway to increase the length of time it takes for police to remove them.

Hundreds of arrests were made, with some people detained several times.

Members of Insulate Britain occupying a roundabout leading from the M25 motorway to Heathrow Airport in London in September
Members of Insulate Britain occupyied a roundabout leading from the M25 to Heathrow Airport in September (Steve Parsons/PA)

Angry drivers often confronted the protesters and attempted to drag them away.

The latest demonstration was near a busy industrial estate in Thurrock, Essex, on Wednesday morning.

Insulate Britain previously admitted its actions on the M25 were “in breach” of an injunction obtained by the Government last month.

People who break injunctions can be found to be in contempt of court, but the protests continued as prosecutions usually take several months.