The Met Police have made two more arrests over the Insulate Britain M25 blockades - bringing the total number up to 28.
Officers said a 36-year-old man was arrested in Streatham, south London, on Wednesday and a 51-year-old woman was detained in Warrington, Cheshire, on Thursday.
The suspects - arrested on charges of conspiracy to cause a public nuisance - were released under investigation, amid anger about the same protesters being taken into custody and released only to return to blocking traffic.
Home Secretary Priti Patel has vowed to crack down on the mob - as ministers won a High Court injunction banning them from blocking any motorway in the country.
More than 30 protesters were seen running into flowing traffic near Cobham on Tuesday
It came as London Mayor Sadiq Khan weighed into the row today, saying the protesters had 'got it wrong'.
While he defended the right to protest 'peacefully, lawfully, safely' and said it was important to address the climate emergency, he warned the actions of Insulate Britain were not lawful or safe.
And they were not encouraging people to join the climate cause, Mr Khan said.
Commons Leader Jacob Rees-Mogg has also criticised the protesters on UK roads as 'frightful old humbugs, causing trouble, distress, inconvenience and nearly causing people to die'.
Insulate Britain has shut down parts of the M25 motorway around London five times in just over a week in a bid to force the Government to insulate and retrofit homes across the UK to cut climate emissions.
The move, which has seen hundreds arrested, has prompted an angry backlash in some quarters.
Home Secretary Priti Patel has vowed to crack down on the mob - as ministers won a High Court injunction banning them from blocking any motorway in the country
The Government has successfully applied to the High Court for an order which prohibits anyone from blocking the M25 with those breaking the injunction facing a possible two years in prison or an unlimited fine.
Speaking to reporters after a speech on the climate and air pollution crises facing London and the world, Mr Khan said: 'I'm someone who passionately believes in the right to protest peacefully, lawfully, safely.
'Democracy isn't just voting once every five years, democracy is going on protests, going on marches, signing petitions, lobbying your MP, lobbying the mayor and so forth.
'I'm also somebody who has said loudly and clearly, there is a climate emergency, you know, climate change is really significant.
'We've got to make sure we address the climate emergency.'
This is the moment that vehicles are forced to break on the M25 as protesters make their way across the carriageway on Tuesday
But he said: 'I think the tactics of those people who are protesting on the M25 are completely wrong.
'It's wrong because it's not lawful, it's not safe.
'You're endangering in your own life, you're endangering the lives of those on the M25, they could be people rushing to get to a hospital, it could be they're going to an appointment, and you're jeopardising their safety by jumping in front of cars on the M25.'
And he warned: 'You're not encouraging people to join our cause, you're not encouraging people to understand the importance of addressing the climate emergency.'
Mr Khan said he had been investing in insulation and retrofitting in London and had been lobbying the Government to give the capital more help to do so.
Members of the eco-group Insulate Britain are blocking traffic on the motorway near junction 10 in Surrey on Tuesday
But he warned: 'You're not making people like me more sympathetic to this issue of climate emergency, and actually what you've done inadvertently is to get parliamentarians bringing in laws to reduce the ability of those of us who want to protest lawfully, peacefully and safely.
'And so notwithstanding my commitment to the right to protest, and the fact that I think we should address the climate emergency, I think they've got it wrong.'
In the Commons, Mr Rees-Mogg defended Britain's tradition of freedom of speech, but said: 'Peaceful protest doesn't mean running in front of cars and risking the lives of police and meaning that people who need stroke treatment may be much more seriously debilitated than they would otherwise have been.
'It doesn't mean people saying we should insulate our homes and not insulating their own homes, frightful old humbugs, causing trouble, distress, inconvenience and nearly causing people to die.'
A Met statement said: 'This follows three arrests made last week for the same offence. A 55-year-old man, 45-year-old woman and a 49-year-old man were arrested for conspiracy to cause public nuisance on Monday, September 13.
'In total, Met officers have made 28 arrests for those obstructing the public highway.
Insulate Britain rabble revealed: Convicted heroin dealer who sickened veterans with Cenotaph demo, vicar 'protesting for God', 'brickie' with £1m properties and teacher married to ex-BBC bigwig are among the usual suspects bringing misery by closing M25
By Andrew Young, James Gant and Tom Pyman for MailOnline
A convicted heroin dealer who sickened veterans with a demonstration at the Cenotaph, a vicar 'told to protest by God' and a teacher married to an ex-BBC bigwig are among the Insulate Britain protesters crippling the UK's motorways, it was revealed tonight.
Former soldier Donald Bell, one of the eco warrior zealots who joined the campaign group outside the Home Office today, has a criminal past and was exposed last year by MailOnline for allegedly abusing his disabled wife.
The 65-year-old was also condemned by war heroes last year when he staged a climate change protest in support of Extinction Rebellion at the Cenotaph in London on Remembrance Day on November 11.
He was pictured in military fatigues as he walked over official tribute wreaths to plant his own one on the monument, emblazoned with red and white poppies and the message 'Act Now – Climate Change Means War'.
MailOnline later revealed how he was jailed for four years in 2007 after being caught pushing his wheelchair-bound wife around the streets of Cambridge while peddling heroin at the same time.
Donald Bell was back to his climate change antics today when he joined around 60 other protesters in a demonstration outside the Home Office after the Government successfully obtained a High Court injunction banning any further Insulate Britain protests on the M25
Former soldier Donald Bell (above) who hijacked the Cenotaph Remembrance Day ceremony is a convicted heroin dealer who was accused of abusing his disabled wife, MailOnline has learned
It comes as the backgrounds of a number of his fellow Insulate Britain demonstrators were revealed tonight, including teacher Louise Lancaster, who is married to a former BBC technology director, brickie Joshua Smith, who boasts a £1m property portfolio, and retired vicar Mark Coleman.
Cambridge Crown Court heard how Bell hid drugs under his late wife Heather's blanket and tried to sell wraps of heroin to undercover police officers.
A separate hearing in 2008, when Mrs Bell was sentenced, heard that she was a victim of domestic violence and had claimed she had been sucked into drug-dealing by her ex-husband in return for his care for her.
Duncan O'Donnell, for the prosecution, told the court: 'It would appear the modus operandi was that Heather Bell would store the heroin to be supplied underneath her blanket.'
Mrs Bell, who had been living in a hostel in Cambridge, admitted three charges of involvement in the sale of drugs to test purchase officers in the city centre in the summer of 2007.
Passing a 12-month jail sentence, suspended for two years, along with probation supervision, Judge Gareth Hawkesworth, told her: 'If you had been in good health you would have been going to prison for three years.'
The court heard how Mrs Bell had answered some of the phone calls when the undercover police put in orders for heroin as part of a sting operation and was using the drug herself. She is
