Three people have been arrested after orange paint was sprayed on Wellington Arch in London by Just Stop Oil protesters.
Smoke flares were also set off alongside the Grade I-listed monument, which is nearly 200 years old.
Campaigners used fire extinguishers to spray the paint as part of the protest against new fossil fuel licences.
According to the Just Stop Oil website, one of those taking action at the monument was Joshua Lane, 26, an engineer from Sheffield, who said: “I am compelled to take action due to the severity, and sheer emergency we find ourselves in today.
“Future generations live in uncertainty, and we are given false promises time after time by endless pantomime governments.”
Another of the activists, Joe Hogan, 40, from Hertfordshire, said: “Traditional, managed, sanitised forms of protest have done nothing.
“The only way forward is through sustained, disruptive civil resistance.”
The protest comes just weeks after the government backed the development of the UK’s largest untapped oil and gas field at Rosebank, 80 miles west of Shetland.
It came despite warnings about the climate damage of new fossil fuel projects and with analysis showing the project is likely to have little positive impact on the British economy.
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The Met Police confirmed it was made aware of the protest just before 10.20am on Wednesday and three people were arrested on suspicion of criminal damage.
The protest comes after three other climate campaigners were each given a 12-month community order and 60 hours of unpaid work for invading the pitch at Lord’s cricket ground in London.
Judit Murray, 69, Daniel Knorr, 21, and Jacob Bourne, 27, were sentenced at Westminster Magistrates’ Court on Tuesday for stopping play during the second Test between England and Australia on 28 June.
In a separate case at the High Court, 12 Just Stop Oil supporters are accused of breaching a court injunction by staging a protest on the M25 in November last year.
On Tuesday, 76-year-old grandmother Gaie Delap, from Bristol, told the judge in the hearing she had climbed on to a motorway gantry because the “climate emergency” was not being taken seriously enough.
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Two people who died following a fire at a caravan site near Skegness have been named by police.
Lincolnshire Police said 48-year-old Lee Baker and his 10-year-old daughter Esme Baker, both from the Nottingham area, were killed in the blaze.
However, formal identification is still yet to take place and “could take some time”, the force said.
Emergency services were alerted to a fire at Golden Beach Holiday Park, in the village of Ingoldmells, at 3.53am on Saturday.
In a statement issued through police, a member of the Baker family said: “Lee and Esme were excited to be spending the first weekend of the holidays together.
“We are all utterly devastated at what’s happened.
“This loss is incomprehensible at the moment, and we ask for people to give us space to process this utterly heartbreaking loss.”
A GoFundMe page set up for the victims’ family described the father and daughter as “two peas in a pod” who were “both happy-go-lucky people who loved life”. It has so far raised more than £3,000.
The police force, together with Lincolnshire Fire & Rescue, are continuing to investigate the cause of the blaze.
Detective Inspector Lee Nixon said: “We believe we might be close to arriving at a working hypothesis.
“We are working hard to validate the facts available to us to be able to provide answers for the family and loved ones of those who were very tragically taken by this fire.
“Yet the evident intensity of the fire has made this task incredibly challenging.”
Dan Moss, from Lincolnshire Fire & Rescue, said: “Our thoughts and deepest condolences are with the family at this time.
“Our Fire Investigation Team is working with colleagues from Lincolnshire Police, and a full investigation into the cause of the fire is ongoing.
“Once investigations are complete, local fire crews and our community fire safety team will be on hand to talk to people in the area and address any fire safety concerns they may have, at what will be an upsetting time.”
A man has been arrested by police investigating a “significant” wildfire that triggered a major incident in Northern Ireland.
More than 100 firefighters and 15 fire appliances were deployed on Saturday to Sandbank Road, Hilltown, to tackle the blaze which is believed to have been caused deliberately, fire chiefs said.
Northern Ireland Fire and Rescue Service (NIFRS) said the fire had a front of approximately two miles “including a large area of forestry close to property”.
It was extinguished at 2.53am on Sunday and the major incident status lifted, the NIFRS said.
“The cause of this fire is believed to have been deliberate,” chief fire and rescue officer Aidan Jennings said.
The Police Service of Northern Ireland said on Sunday that a 25-year-old man had been arrested “on suspicion of arson being reckless as to whether life would be endangered, and non-related driving offences”.
“He remains in custody at this time as enquiries continue into the circumstances surrounding the fire,” the force added.
Image: The wildfire on Sandbank Road, Hilltown. Pic: Sky Watch NI
Image: More than 100 firefighters were at the scene of the fire. Pic: Sky Watch NI
On Saturday, helicopters were deployed to tackle Scotland’s fourth wildfire this week, with police saying a blaze “which started in the Newton Stewart area has spread northwards and is expected to reach the Loch Doon area of East Ayrshire around 12am on Sunday”.
Police Scotland added: “As a precautionary measure members of the public are asked to avoid the Loch Doon area and anyone who may be camping in the area is advised to leave.”
Image: Moors Valley Country Park blackened by fires this week
Elsewhere in England, Devon and Cornwall Police said they were assisting the fire service with temporary road closures on the A30 in the Bolventor area as they tackle “a number of fires” on moorland.
In Dorset, Moors Valley Country Park was forced to close after multiple wildfires broke out there on Wednesday.
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Wildfires spread across nature reserve
Separate incidents were then reported at Upton Heath in Poole on Wednesday, and nearby Canford Heath in the early hours of Thursday.
Friday was officially the warmest day of the year so far – with temperatures in the south of England reaching 23C (73.4F) – the highest since 21 September last year, according to the Met Office.
Police are investigating after a man was shot dead in County Durham.
Officers were called to an address in Elm Street, Stanley, at about 5.20pm on Saturday after reports of a “disturbance”, Durham Constabulary said.
A man in his 50s was found to have been shot and despite the efforts of paramedics he was pronounced dead at the scene.
His family have been told and are being supported by specially trained officers.
Specialist crime scene investigators are at the scene, and officers are carrying out house-to-house enquiries.
A cordon is in place and is expected to stay there for some time.
Detective Superintendent Neil Fuller said: “This is a truly shocking incident in which a man has been shot and has sadly died.”
He added: “Residents may see an increased police presence in the area. I would like to thank them for their support while we carry out this investigation.
“Our thoughts are with the man’s family at this time.”