Hardeep Singh Koli explores the religious and cultural make-up of the UK by visiting three of its most diverse cities. His first stop is Cardiff, and he starts his journey at Cardiff Bay, now the home of the Welsh Assembly building and rows of gleaming luxury flats. But this was formerly the site of the docks and the gateway for hundreds of thousands of people from all over the world who settled in Cardiff, making it the vibrant, multi-cultural city it is today Hardeep tavels around the Butetown district, once a melting pot of nationalities and faiths, such as Somalis, Yemenis, Norwegians and he will hear how 60% of Cardffians can actually trace their lineage back to the Irish labourers shipped in to build the docks in the nineteenth century He will hear how these different groups lived, worked and worshipped together in Butetown before the area was flattened in what is still known as 'the deluge'. He will end his trip by attending a service at a loud, colourful and richly diverse Evangelical Christian church in the city to ask whether this is the future of worship.