This morning climate campaigners gathered outside City Hall in London to protest re-elected Mayor, Boris Johnson's plans to be an airport in the Thames Estuary.

So-called 'Boris Island' has been proposed and rejected as many as six times in the last twelve years, and is one of the the Mayor's most controversial plans.

Campaigners outside City Hall today included members of the RSPB, who are concerned for the welfare of over 300,000 migrant birds that feed and roost in the area during winter. They claim that an airport in the Thames Estuary would result in a threat to birds twelve times greater than at any other major UK airport.

Also in attendance was a representative of the Friends of North Kent Marshes, who campaign on behalf of the residents of the area. He said that "40,000 people would have to be moved if an airport was built in the estuary", and that this is "not just an environmental issue, it's about people too".

Jenny Jones of the Green Party who came out of City Hall to show her support said that Boris' plans are ridiculous, and an attempt to get to the heart of the Tories. Similarly, Caroline Pidgeon, leader of the Liberal Democrat London Assembly Group, and a member of the Metropolitan Police Authority said that 'Boris Island' is opposed across the parties.

The campaigners were clear with their opposition of the airport plans, attacking them from an environmental, human and economic perspective. That the plans have already been scrapped six times suggests that the barriers to the airport are stronger than Boris' proposals.