Image copyright PA Media Image caption Organisers estimate that 12,000 people - including school children, farmers, grandparents and nature lovers - joined the rally

A coalition of environmental protesters from across the country have descended on Westminster to lobby politicians over the issue.

"The Time is Now" group promised a wide range of people would take to the streets around Parliament, including surfers and nuns, and they would come from a wide range of organisations, such as Christian Aid, the Women's Institute and the National Trust.

Archbishop of Canterbury Lord Rowan Williams, who led a march at the event, said the group had a "vision of the sacredness, depth and solidity of the material world we find ourselves in".

A number of MPs came out of Parliament to talk to the protesters.

Here are some of the pictures from the day of action.

Image copyright PA Media Image caption Protesters gathered on Albert Embankment in London before heading to Parliament

Image copyright PA Media Image caption The event was organised by The Climate Coalition and Greener UK. Shaun Spiers, chief executive of Greener UK, said they wanted to see "an ambitious environment bill and policies that put us on track for net zero emissions by 2045"

Image copyright PA Media Image caption Demonstrators set off their mobile phone alarms en masse to highlight the urgency of the climate issue

Image copyright PA Media Image caption Shadow foreign secretary Emily Thornberry spoke to some of those gathered nearby Parliament

Image copyright PA Media Image caption Tory MP Damian Green talked to one of his constituents

Image copyright PA Media Image caption Lib Dem MP Chuka Umunna attracted a crowd

Image copyright PA Media Image caption Recycling enthusiasts joined members of the Women's Institute, Surfers Against Sewage and Islamic Relief, among a host of other groups

Image copyright PA Media Image caption They want MPs to act now to cut UK carbon emissions and pass ambitious new laws to tackle air and plastic pollution

All pictures subject to copyright