Currently, Ashok is the CEO of the climate change solutions charity Ashden. He has been recognised as one of the UK's top environmentalists and ethical leaders, appearing in various prestigious listings, including London's 1000 most influential people. He studied physics at the University of Bristol and earned a PhD in renewable energy from Cambridge. Afterward, he conducted climate change research at Reading University and Imperial College London, publishing works on climate feedback processes. He then moved into policy analysis with Forum for the Future, working on renewable energy and climate change policy, before briefly working for Solar Century. In advocacy, Ashok co-founded the UK Make Poverty History campaign and was a key figure in the Jubilee Debt Campaign. In 2005, he became Director of the Stop Climate Chaos (SCC) coalition (now the Climate Coalition), which led the UK’s I Count campaign and played a pivotal role in securing the UK's Climate Change Act 2008. SCC also helped organise "The Wave" event, the largest global climate campaign at the time. Later, he became CEO of the London Cycling Campaign, driving campaigns like Love London, Go Dutch, and Climate Safe Streets.