Around 100 protesters, believed to be English Defence League supporters, are holding unplanned protests in two areas of Manchester.
There are also reports of a counter-protest by members of Unite Against Fascism in another part of the city.
Greater Manchester police have told ITV Granada that one person has been arrested on suspicion of a public order offence.
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The party leader said her MPs may be in a position to act as deal makers - and they would refuse to allow an exit from the EU.
Oliver Healey said he set up the page before the referendum and it has now been "hijacked" by Remain backers.
Another unsettled day ahead for most.