Sir Keir Starmer warned far-right thugs that there will be no let-up in bringing them to justice, amid concerns there could be a fresh wave of violence this weekend.
The Prime Minister on Thursday held a third emergency Cobra meeting since the unrest began, where he said the UK needed to remain on “high alert” for any further unrest in the coming days.
On Friday on a visit to a Met Police control room in Lambeth he stressed individuals plotting disturbances this weekend, and those inciting violence online, would face the “full force of the law”.
The Sun has reported that far-right thugs are planning 11 more riots in secret Facebook groups, with some said to be planned for this weekend.
It said protests are planned in Ballymena, Newcastle, Liverpool, Shrewsbury, Salford, Taunton, Birmingham, Dover, Bournemouth and Glasgow in the coming weeks.
It said organisers plan to unleash chaos on the opening gameweek of the new English football season this weekend - before carrying on into next month.
Behaviour which is "violent" or "thuggish" could see English Football League (EFL) fans go through the criminal justice system "quickly", a minister suggested ahead of kick-off on Friday evening.
Asked about fears "far-right groups could seek to exploit" games, Nick Thomas-Symonds told Sky News: "Going into this weekend, it's important that the message continues to go out that if you engage in violent, thuggish behaviour on our streets, you're going to be dealt with quickly by the criminal justice system.
"We've already seen sentences of up to three years handed down, people now facing the inside of a prison cell because of the appalling way in which they've conducted themselves in recent days.
"But also we'll continue to make those additional officers available and where there are communities with particular fears, I was in Bristol for example yesterday talking to Muslim community leaders, we will make sure that we make protection available to those communities as well.
"It's hugely important."
A list of more than 30 rumoured targets for gatherings circulated online ahead of the feared unrest on Wednesday, when police were said to be monitoring reports of up to 100 protests.
In London demonstrations were feared in Harrow, Hounslow, Finchley and Walthamstow.
Other locations around the country where it was feared there could be rioting included Middlesbrough, Birmingham, Blackpool, Liverpool, Oxford and Hull.But the widespread unrest that was feared didn’t materialise.
In London and other parts of the UK tens of thousands of people held counter protests - with Met Police chief Sir Mark Rowley hailing the “show of force” and “unity” from police and Londoners that faced down the feared threat from far-right thugs.
