by Arthur Martin and Larisa Brown / Daily Mail

Anarchists and Left-wing rabble-rousers plan to disrupt Britain with a ‘summer of protests’ after a violent mob tried to storm Downing Street.

Diehard fanatics are plotting a rally at the State Opening of Parliament outside the Palace of Westminster on May 27.

And members of anarchist group Class War – who clashed with riot police in Whitehall over the weekend – released incendiary posters calling on comrades to take part in violent protests later this month.

Far-Left groups are planning a mass anti-austerity demonstration outside the Bank of England in June – to which more than 37,000 people had accepted an invitation last night. Extremists across Britain are laying on coaches to the event.

Police fear it could mirror violent riots of previous years with businesses and shops under siege.

Protesters brandished a range of home-made placards containing offensive slogans as they marched upon Downing Street.

Officers tried to hold back the large group of protesters as they tried to push their way through the large police cordon on Downing Street

The Metropolitan Police said 17 people have been arrested on suspicion of violent disorder and assault as well public order offences Some of the protesters wore masks and balaclavas in a bid to hide their identity from police officers attempting to keep the peace.

Such large-scale protests are difficult to police as breakaway groups often have the sole aim of damaging property and injuring officers.

Anarchist group Reclaim The City said it would ‘raise hell’ at the Bank rally, writing on Facebook: ‘Our voice is ignored year after year so now is the time to make them afraid and make real change happen for us all.’ Supporter Sam Lacombe added: ‘We will need to be violent and burn the buildings. This will end austerity.’

Police are monitoring a growing torrent of disturbing online messages. Using pseudonyms, protest organisers issued a call to arms on social media – which gathered pace yesterday as radicals gleefully posted pictures of officers injured in Saturday’s clashes.

Class War wrote on Facebook that it ‘salutes all those who fought the cops at Downing Street yesterday. We are a hate mob. We hate the f****** rich, the Tories and the cops.’ Four police officers and a member of police staff were injured in the violence on Whitehall.

Protesters, some masked, hurled smoke bombs and missiles as a raucous crowd brandished flags and Socialist Worker Party placards with the slogan: ‘Get the Tories out.’ Ahead of VE Day commemorations, one anarchist sprayed ‘F*** Tory Scum’ on a memorial to women who served in the Second Word War.

Organisers had planned the rally on Facebook hours after the Tories’ resounding election victory.