London, UK - Thousands of protesters took to the streets in English cities on Wednesday to oppose days of Islamophobic and racist far-right violence that have had UK police on high alert.

Nightly riots – during which mosques, businesses, and facilities for asylum seekers were attacked – erupted across towns and cities in England and Northern Ireland, fuelled by a wave of misinformation surrounding the murder of three children on July 29.

But on Wednesday evening, it was anti-racism and anti-fascist counter-protesters who were out in far greater numbers, holding rallies in cities up and down England and Northern Ireland including London, Birmingham, Bristol, Liverpool, Newcastle, and Derry.

"Whose streets? Our streets!" chanted protesters at a few-thousand-strong gathering in Walthamstow, northeast London, where some held banners saying "Stop the far right!" and others flew Palestinian flags in solidarity with those suffering under Israel's destruction of Gaza.

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"I live in the borough and we don't want these people on our streets... they don't represent us," Sara Tresilian (58) told AFP, referring to fascists.

"You have to turn out (and) give that message... I think it's important that you show up for your friends and neighbors."

Andy Valentine, the Met Police's deputy assistant commissioner, thanked "communities for coming together across the capital and for showing community spirit this evening."

In Sheffield, activists chanted "Say it loud, say it clear, refugees are welcome here," as riot police looked on.

In Birmingham, hundreds of anti-racism protesters gathered outside a migrant support center, while in Brighton, around 2,000 people took part in a peaceful demonstration, according to police.

There was some friction, however, as in the southern town of Aldershot, where the PA reported police had to intervene between anti-racism activists and a group of people shouting "Stop the boats" – a reference to refugees who reach Britain by crossing the English Channel.

The racist rioting has seen almost 430 people arrested and at least 120 charged, and has led several countries to issue travel warnings for the UK.

The violence broke out after three girls aged nine, seven and six were killed and five more children critically injured during a knife attack at a Taylor Swift-themed dance class in Southport, northwest England.

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False rumors, stoked by prominent far-right figures such as notorious Tommy Robinson and Reform Party leader Nigel Farage, spread on social media saying the attacker was a Muslim asylum seeker. The suspect was later identified as 17-year-old Axel Rudakubana, born in Wales.

Elon Musk also jumped on the bandwagon by saying that a British "civil war is inevitable."

The days that followed saw rioters throw bricks and flares at police officers, burn cars, and attack mosques and at least two hotels that have been used for asylum seekers.