Not an exhaustive list, but for any Brits who see this, there's expected rioting tonight in:
Cleveland, Thornaby. Likely to be at the mosque in Westbury Street at ~5pm
Durham. Both in the city centre and apparently at the Bishop Auckland Town Hall.
Leicestershire, Coalville. Potentially starting at the clock tower.
Manchester. Potentially the police station in Salford.
Peterborough. Some talk about gathering outside the prison.
Rochdale. Outside the Broadfield Hotel on Sparrow Hill.
Scunthorpe. Reports of it starting at Scunthorpe Museum on Oswald Street moving off to Frodingham Road. Late to posting this as reports said it would start at 12.
Sheffield. The Holiday Inn is a suspected target. I believe it's off of Victoria Station Road.
Stoke-on-Trent. Potentially at the Best Western Hotel on Audley Road.
Also in Northern Ireland, there's expected to be one at Chimney Corner in Belfast, and in Newton Abbey.