Black Lives Matter organisers have cancelled a protest in London's Hyde Park over fears it would be hijacked by far-right groups.
Former English Defence League (EDL) leader Tommy Robinson has expressed support for calls by the Democratic Football Lads Alliance for people to travel to the capital to protect monuments.
A protective box has been erected around the statue of Sir Winston Churchill in Parliament Square, while scaffolding and boards were put up around the Cenotaph after the monuments were targeted last weekend.
The protests, sparked by the death of George Floyd in Minneapolis, saw clashes between protesters and police in London, while in Bristol a statue of Edward Colston was pulled down and dumped in the harbour.