Pink Floyd star's son boasts of 'beautiful scenes' as anarchists try to storm Eurostar platforms with smoke and paint bombs in Battle of St Pancras

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He shocked Britain when he swung from a flag on the Cenotaph as part of a demonstration against student tuition fees, and last night Charlie Gilmour, the adopted son of Pink Floyd guitarist David Gilmour, was back on the barricades.

Gilmour, 25, who was handed a 16-month jail sentence for his part in the 2010 student demonstration, was at St Pancras station in North London when around 150 protesters supporting refugee rights armed with smoke and paint bombs clashed with police as they tried to storm the Eurostar platforms.

Following the furore Gilmour posted a boastful message on Twitter which read: 'Beautiful scene at the St Pancras protest. Anarchists attacked by police responded by nicking their hats and vanishing into the mist.'

Today police confirmed two people, a man and a woman, were arrested after the pro-refugee protesters clashed with police last night.

Up to 150 protesters from the group No Borders clashed with police at St Pancras railway station this evening after trying to get on to platforms 

Charlie Gilmour, the adopted son of Pink Floyd guitarist David Gilmour, centre, was at St Pancras station when about 150 protesters supporting refugee rights clashed with police

Gilmour, 25, was handed a 16-month jail sentence for his part in the 2010 student demonstration, when he was pictured climbing on the Cenotaph and swinging on a flag

The protesters had attempted to erect barriers outside one of the entrances to the station but they were taken away by police as the demonstration became violent

Today police confirmed two people, a man and a woman, were arrested after the pro-refugee protesters clashed with police 

Some demonstrators allegedly threw smoke bombs at officers on Saturday night as activists stormed police lines at the rail hub

But on this occasion, Gilmour was not actively taking part in the protest. 'I was at the King's Cross protest as a freelance journalist and observer,' he told The Mail on Sunday.

'I was researching a piece about refugee solidarity in Britain.'

Despite not being involved, Gilmour has recently tweeted a series of messages in support of migrant groups.

Activists had tried to enter the railway station, which is the UK terminal for Eurostar services to Europe to highlight the plight of refugees in Calais

Green smoke bombs were thrown by some activists as they faced off with police at the east entrance to St Pancras railway station 

It is believed that the protesters who clashed with police had taken part in a peaceful demonstration organised by the group No Borders to coincide with similar protests held in Paris earlier in the day

The demonstrators were stopped by the police as they tried to get on to Eurostar platforms headed towards Europe at St Pancras 

A protester carries a flare as police escort demonstrators away from St Pancras station. There have been no reports of injuries

Up to 150 protesters took part in a demonstration in response to the plight of those attempting to travel to the UK from Calais

Following the clash a woman was arrested on suspicion of assaulting two police officers and a man was arrested on suspicion of a public order offence

Earlier this month he wrote: 'Borders kill don't ya know.'

It is believed that the protesters who clashed with police had taken part in a peaceful demonstration organised by the group No Borders to coincide with similar protests held in Paris earlier in the day.

The protesters tried to enter the railway station, which is the UK terminal for Eurostar services to Europe, to call for a relaxation of borders.

However, they were stopped by officers from the Met and British Transport Police as they tried to get on to Eurostar platforms and the demonstration turned violent when paint and smoke bombs were thrown.

The protest also spilled out into nearby King's Cross station as police herded the activists into a corner of the railway terminal as passengers look on 

Demonstrators clash with riot police from the Met and British Transport Police after trying to storm St Pancras Eurostar terminal 

Police try to remove the protesters from St Pancras station, who were trying to raise the plight of migrants who have died trying to reach Britain from Calais

The demonstration comes just a week after another protest by 250 people in support of migrants at the London Eurostar terminus

Officers could be seen brandishing their truncheons as they fought back against protesters, many of whom covered their faces with scarves

A police officer tries to safely dispose of a smoke bomb that was thrown during the protest as activist moved on to nearby Granary Square to continue their demonstration 

Pictures from the station also showed tussles with metal barriers as police brandished their truncheons as they tried to force protesters from the station.

The activists also tried to pour red liquid on the floor of the station in memory of migrants who have died trying to use the Channel Tunnel to enter Britain.

Eventually the activists were removed and made their way along to nearby Granary Square, where they continued to protest.

They carried banners reading: 'The people want to bring down the borders' and 'We don't cross borders, borders cross us.

Train passengers turning up for services at nearby King's Cross station were also greeted with a large group of riot police trying to diffuse the violence

A police hair is left abandoned after the protesters smeared red paint inside St Pancras train station during the demonstration 

A spokesman from British Transport Police said: 'At around 6pm a number of protesters arrived at St Pancras rail station and officers are currently facilitating a peaceful protest.

'Around this time a number of other individuals arrived at the station causing disorder, and missiles, including smoke bombs were thrown at police officers. This group were dispersed by police and officers remained at the station.

A Met Police police spokesman said the vast majority of those involved had left the station at about 7.30pm.

The British Transport Police (BTP) added today that a woman and man were arrested during the clashes.

In a statement the force said: 'At around 6pm on Saturday 24 October a number of protesters arrived at St Pancras rail station and officers worked to facilitate a peaceful protest.

'Around this time a number of other individuals arrived at the station causing disorder, and missiles, including smoke bombs were thrown at police officers.

'A woman was arrested on suspicion of assaulting two police officers and a man was arrested on suspicion of a public order offence.' 

Activists carried banners reading: 'The people want to bring down the borders' and 'We don't cross borders, borders cross us

A Met Police police spokesman said the vast majority of those involved had left the station at about 7.30pm

He added: 'At around 6pm a large group of protesters broke away from the static demonstration and attempted to enter the Eurostar platforms at the station. They were stopped from doing so.'

The demonstration comes just a week after another protest by 250 people in support of migrants at the London Eurostar terminus .

'We demand that the UK and the US and the EU open their borders to all migrants and refugees,' said one protester, who declined to be named.

'We demand that Theresa May shuts down all detention centres and end all deportation,' the protester added, referring to the Home Secretary.

Despite his run-ins with the law, Gilmour, an ex-pupil at £11,000-a-term Lancing College in West Sussex, has courted controversy since beginning a career as a journalist.

He recently wrote an article about using magic mushrooms – a class-A drug – to help stop smoking. And when Jeremy Corbyn suggested he would work with Blairites in the Labour Party, Gilmour said they should be hung from lamp-posts ‘as warning to future war criminals’.

Gilmour was adopted by the Pink Floyd guitarist after the rock star began a relationship with his mother, writer Polly Samson. They married in 1994. His biological father is radical playwright and poet Heathcote Williams.

David Gilmour, whose fortune is estimated at £85million, said his son’s imprisonment was a ‘deeply depressing experience’. He said: ‘Seeing your child in a prison grey tracksuit is not something I would recommend to any parent.’

Miss Samson said seeing her son in HMP Wandsworth was ‘horrible’. The couple’s homes include a six-storey seafront mansion in Hove, a Sussex farmhouse and a mews house in London, while their son lives in Stoke Newington, North London.