British riot police are expected to stay on standby for the "foreseeable future" including through the weekend "and beyond", according to a police chief.
Assistant Chief Constable Mark Williams said officers will continue to be deployed until "the end of the disgusting scenes that we're seeing across the country".
Around 6,000 officers have been mobilised to respond to incidents of violence and disorder around the country - about 30% of the total national reserve who are trained to respond to public order incidents and routinely stand ready to be called in when required.
The number deployed so far includes 3,750 who are tasked with responding to incidents in their force area, with an additional 2,000 who can provide backup or be sent to their neighbouring regions or other parts of the country.
Police sources said the numbers would rise if needed.
It comes as police are monitoring reports of at least 30 possible gatherings and threats by "hateful and divisive groups" against immigration law specialists.
A list of solicitors' firms and advice agencies has been shared in chat groups as possible targets for gatherings, with the message inviting people to "mask up" if they attend.
The Law Society of England and Wales described such gatherings as a "direct assault on our legal profession", while the UK's justice minister, Shabana Mahmood, said threats against solicitors are "unacceptable" and those making them will "join the hundreds of others who have already been arrested by police within the last week".
Staff at some of the businesses named said they have been advised to work from home, and that police and fire officers had visited their premises to check security arrangements, including CCTV cameras and smoke alarms.
The National Police Coordination Centre (NPoCC), which is tasked with organising the support provided to forces, was set up in the wake of the 2011 riots so police could better share resources as they respond to similar incidents in the future.
It means thousands of officers trained in responding to public order incidents can be deployed in as little as 24 hours when required.
The body's other work includes gathering intelligence on protests - drafting in teams of analysts and police officers to look at information and share among forces as incidents emerge.
Mr Williams, the national mobilisation co-ordinator at NPoCC, told the PA news agency that officers will "remain on standby for the foreseeable future, and certainly through to this weekend and beyond", adding: "We are ready for the days ahead and will continue to be ready, and we'll act swiftly to bring the offenders to justice."
"We've got a busy night tonight, that's our expectation, certainly the intelligence and the list of potential disorder locations and events and the targeting of certain locations is quite significant.
"So there is a huge policing presence out to manage that, to prevent it, to be visible and to bring a capacity at a local level to deal with it robustly.
"But we will continue to monitor going forward through those intelligence structures and other such things to ensure that we do mobilise and work with the local forces to deploy a sufficient set of resources to be ready for anything that may prevail," he said.
He insisted officers have the equipment needed to be deployed but said there will still be other competing needs for resources as well - ahead of the start of the football season and other protests which have been taking place.
The costs of the operation so far have not been disclosed but Mr Williams said: "Money is not a factor in our response. We will put whatever resources at whatever cost to dealing with this until we have brought all those responsible to justice."
The welfare of officers was also "incredibly important" and there was a "responsibility to take care of our officers" while working to keep the public safe, he said.
"We have sadly seen a number of our officers being injured and some of our horses and dogs. It is truly awful."
British Prime Minister Keir Starmer has praised the "robust and swift response" of the criminal justice system, adding that he expects the sentencing of some of those involved to take place by the end of the week.
Speaking to reporters after chairing his second Cobra meeting in two days, he said: "That should send a very powerful message to anybody involved, either directly or online, that you are likely to be dealt with within a week.
"Nobody, but nobody, should be involved themselves in this disorder."
He sought to reassure communities, pledging to keep people safe, while Home Secretary Yvette Cooper told chief constables the government will provide support with overtime pay and other resources needed by police forces.
But the government has faced criticism from some on the right, as well as from X owner Elon Musk, that police had handled the disorder more harshly than if it had involved members of ethnic minorities.
The government has rejected the claims, and Mr Starmer told reporters his focus is on "ensuring that our communities are safe".
Extradition considered against Robinson
Meanwhile, police in Cyprus said they were ready to assist their British counterparts in taking action against far-right leader Tommy Robinson, allegedly instigating anti-migrant violence from a sun lounger on the island.
"We are in contact with the British police, and if they need our assistance, we are ready to help," a Cyprus police spokesperson said.
The Director of Public Prosecutions has said the publication of immigration law firms as potential targets for disorder could be considered a terrorism offence.
Stephen Parkinson said no terrorism charges had yet been brought in connection with violence across the country, but one case of alleged terrorism is "actively under consideration".
Mr Parkinson also said extradition would "of course" be considered in relation to people posting online about inciting UK riots while being out of the country.
More than 400 people have been arrested and 100 charged after disorder around England and Northern Ireland, according to police sources, with the number expected to rise in the coming days.
The violence was sparked by false claims about the identity of the teenager suspected of killing three young girls and injuring several others in a knife attack in Southport on 29 July, and has seen shops looted and hotels housing asylum seekers attacked.
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McEntee and Cooper discuss UK riots during call
Meanwhile, Minister for Justice Helen McEntee spoke with Britain's Home Secretary Yvette Cooper about the "ongoing disturbances" involving the violent riots in Britain.
She promised gardaí would help investigate if there is evidence anyone from the state "participated in acts of violent disorder".
In a statement, she said both the Irish and British governments "agreed on the importance of countering racism, supporting our migrant communities and bringing to justice the perpetrators of such terrible violence".
Ms McEntee also told Ms Cooper that "similar escalations of violence" with "anti-migrant undercurrents" have also taken place in the Republic of Ireland recently, saying that "assaulting police officers, burning buildings and attacking public amenities cannot be tolerated in a democratic society".
The call also comes after recent concern over a number of anti-asylum seeker violent incidents in Ireland, including around the former Crown Paints Factory site in Coolock in Dublin, which is planned to be turned into an international protection accommodation site.
Additional reporting Fiachra Ó Cionnaith
