45 peace campaigners locked on to the railings outside Parliament on Wednesday, with 40-50 supporters nearby.
The activists were highlighting the fact that the UK is refusing to enter into multi-lateral talks to begin the urgent process of eliminating nuclear weapons.
They support the current talks on the United Nations Treaty for the Prohibition of Nuclear Weapons. 122 countries have supported this Treaty. 58 countries have signed the Treaty intending to ratify it later. Only 50 states need to ratify the Treaty for it to become law.
So far the UK, which could play a leading role, has refused to be present at the many preparatory round of negotiations.
For too long the British government has claimed that it would support multi-lateral moves for a nuclear free world. Now is the ideal opportunity for this.