supporter doused in milkshake by protesters was there 'campaigning to ...

An NHS worker has apologised for screaming 'Nazi scum' at a Donald supporter who was covered in milkshake at a protest earlier today.

Siobhan Prigent, who is based in London, took to Twitter to say she was 'very sorry' for her behaviour at the demonstration in Parliament Square.

Video footage from the scene shows a number of marchers yelling at the semi-retired grandfather before he is hit with the beverage.

The man tells the angry mob that he is 'here to stay' before throwing the empty cup back at protesters as a sole police officer attempts to stop the incident from turning into a brawl.

A woman, who is believed to be Ms Prigent, can be seen holding a placard which says 'This episode of Black Mirror isn't funny any more! #NoThanksNazis'.

In the clip, a ' Stinks' face mask also appears to be dangling from the woman's poster.

She wrote in a now-deleted tweet: 'I am very sorry for my behaviour today. I should have protested peacefully & I didn't, & I regret that. 

Siobhan Prigent, pictured, has apologised for her behaviour at a London protest today in which marchers yelled 'Nazi scum' at a Donald Trump supporter

Siobhan Prigent, pictured, has apologised for her behaviour at a London protest today in which marchers yelled 'Nazi scum' at a Donald supporter

A woman, who is believed to be Ms Prigent, can be seen holding a placard which says 'This episode of Black Mirror isn't funny any more! #NoThanksNazis'

A woman, who is believed to be Ms Prigent, can be seen holding a placard which says 'This episode of Black Mirror isn't funny any more! #NoThanksNazis'

In the clip, a 'Trump Stinks' face mask also appears to be dangling from the woman's poster as she yells at him

In the clip, a ' Stinks' face mask also appears to be dangling from the woman's poster as she yells at him  

'I've let myself down & I do understand that fully. There are two sides to every story, but my actions were my own, & that's on me. Please leave my family & friends out of it.'

Her apology comes after the Donald supporter spoke out to reveal he was at the protest campaigning to protect democracy. 

Speaking to MailOnline, the man, who refused to be identified, said he was peacefully debating with 'moderate lefties' and 'having a laugh with the majority of them' before the demonstration turned violent.

He said: 'We have to put forward how aggressive the left can be - it's not us, you know if they want to call me right wing because I'm supporting then I must be right wing, but I'm not a racist.' 

Speaking of the moment he was attacked, the man added: 'I

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