The Baitul Futuh Mosque, also known as the Morden Mosque, is Britain's largest, and one of the largest in western Europe. It was completed in 2003 at a total cost of approximately £15 million, and covers an area of 5.2 acres in the south-west London suburb of Morden with enough room to accommodate up to 10,000 worshippers. This one-off documentary, narrated by Meera Syal, provides an intimate portrait of the workings of the mosque and introduces viewers to some of the staff and worshippers there. These include Mr Khan, the Mosque's chief organiser, and six-year-old Isla, who is preparing for a religious milestone. We also meet three retired academics who run the in-house marriage bureau, and see how the worshippers respond when tragedy strikes in the form of a devastating fire