As many as 46 people have been arrested at a mass protest in London after Palestine Action was condemned as a terrorist group.

Activists descended on Parliament Square to rail against the group's proscription for the second week in a row - despite the Metropolitan Police explicitly warning them that supporting the group was a criminal offence.

Scotland Yard later confirmed that 46 people had been arrested at the rally - after 29 were handcuffed at last week's event.

Two groups of protesters had assembled at the square's Mahatma Gandhi and Nelson Mandela statues for the demonstration at around 1pm.

The individuals were seen holding placards bearing the words "I oppose genocide, I support Palestine Action" before being surrounded by police.

Some activists could be seen lying on top of each other on the floor as police searched their bags and took their ID cards and signs.

The Met was later seen carting off a number of protesters who were lying down, lifting them off the ground and into waiting police vans parked around Parliament Square.

Activists coordinated by campaign group Defend Our Juries have been protesting in London, Manchester and Cardiff today.

An independently-organised protest was also staged in Londonderry.

PICTURED: Police officers remove a person after they took part in a protest in Parliament Square, London, to call for de-proscription of Palestine Action

PICTURED: Police officers carting off a protester after they took part in a demonstration in Parliament Square, London, to call for de-proscription of Palestine Action