Protesters Target Banks in London

Protesters started gathering Friday in the heart of London's historic financial district to lobby against the use of fossil fuels ahead of the start of the UN climate summit in the Scottish city of Glasgow.

The protests in London, which were to be joined by Swedish climate activist Greta Thunberg, are part of a worldwide day of action before before leaders head to Glasgow for the U.N. Climate Change Conference, known as COP26. Many environmentalists are calling the Oct. 31-Nov. 12 gathering the world's last chance to turn the tide in the battle against climate change.

The protest began outside the insurance marketplace of Lloyd's of London, as demonstrators called for the global financial system to stop investing in the use of fossil fuels.