More than 600 lobbyists from some of the world's biggest polluters have registered for the climate talks in the Egyptian resort of Sharm el-Sheikh.

The number of delegates with links to fossil fuels at the UN climate summit has jumped 25% from the last meeting.

That's more than the combine delegations from the 10 most climate-impacted countries.

 These conferences have always attracted significant numbers from the coal, oil, and gas industries, who are keen to influence the shape of the debate.

 Last year at the UN climate meeting in Glasgow, they counted 503 fossil fuel lobbyists registered. The groups called on the United Nations to restrict access to the talks for fossil fuel firms, which the UN chief Antonio Guterres has said are "poisoning our planet".

 This year that figure has gone up to 636.

 "COP27 looks like a fossil fuel industry trade show," said Rachel Rose Jackson, from Corporate Accountability, one of a group of campaigners who released the data along with the Corporate Europe Observatory.

 "We're on a carousel of madness here rather than climate action. The fossil fuel industry, their agenda, it's deadly. Their motivation is profit and greed. They're not serious about climate action. They never have been and they never will."

The data shows this year, there are more fossil fuel lobbyists than total delegates from the ten countries most impacted by climate change. The biggest single delegation at COP27 is from the United Arab Emirates, who will host COP28 next year and have 1,070 people on the ground, up from just 170 last year.