Communist protesters have scaled the Battle of Britain memorial, chanting and waving flags, as a pro-Palestine march descended on London.Clashes with police erupted and arrests were made around the monument at Victoria Embankment.The bronze and granite memorial commemorates those who took part in the Battle of Britain, defending the UK during some of the darkest days of World War II. Around 20 arrests were made during the protests, the Metropolitan Police confirmed.Officers arrested six for criminal damage after they allegedly climbed the Battle of Britain memorial. Police detained two others for allegedly refusing to remove their face coverings when instructed. Another two were arrested over placards displaying support for the proscribed organisation Palestine Action.The Met imposed conditions on both the march, organised by the Palestine Coalition, and the counter-protest to “minimise the risk of serious disruption to communities”.Communist protesters scaled the Battle of Britain memorial during a London pro-Palestine march | PAProtesters, many wearing keffiyehs and carrying Palestinian flags, gathered on the Embankment before marching through central London to Whitehall.The march proceeded from Embankment towards Westminster Bridge, York Road, Waterloo Bridge and The Strand before reaching Whitehall, where the rally ended shortly before 5pm.Former Labour leader Jeremy Corbyn MP was among the speakers and was enthusiastically received with cheers and chants. Mr Corbyn credited “our demonstrations, our marches” for inspiring Foreign Secretary Ed Miliband’s sanctions package against Israeli settlements in the West Bank. The Met Police arrested six for criminal damage after they allegedly climbed the monument | GB NEWSA separate demonstration organised by Stop The Hate also took place outside New Scotland Yard.Metal barriers and a line of police officers separated the two groups. As the larger pro-Palestine march passed, counter-protesters chanted “Shame on you”.The demonstrations came just days as many marked three years since the October 7 attack on Israel, where Hamas terrorists massacred some 1,200 people. “We know Saturday’s event, so close to the third anniversary of the terror attack on Israel, has the potential to have a greater impact on communities than the previous national marches,” Deputy Assistant Commissioner Carl Galvin said.The monument was scaled as a pro-Palestine march descended on the Capital | PA“We will also be using powers under the Public Order Act requiring anyone in the protest area wearing face coverings to deliberately conceal their identity to remove them.”Under the Act, police are empowered to make arrests of those who refuse to remove a mask. “We will do so if we see groups of people who refuse and are covering their faces with the intention to hide their identity, intimidate and commit offences. That is unacceptable.“But for individual cases, officers must carefully assess why a person is wearing a mask and respond in a measured way.”Twenty arrests in total were made during the protests | GETTYPolice also imposed conditions on the Stop The Hate counter-protest, requiring participants to remain within a designated area outside the Metropolitan Police headquarters.The Palestine Coalition, which organised the main march, includes the Palestine Solidarity Campaign, Stop the War, the Campaign for Nuclear Disarmament (CND), the Muslim Association of Britain, Friends of Al-Aqsa and the Palestinian Forum in Britain.Meanwhile, thousands of people also took part in a national pro-Palestine march through central Edinburgh on Saturday afternoon.After reaching the Scottish Parliament, demonstrators gathered for a rally on the lawns in front of the building, where stalls had been set up, and a series of speakers addressed the crowd.