The UK's favourite churches - Telegraph Prime Minister David Cameron, St Mary the Virgin Church, Witney, Oxfordshire: "St Mary is one of the oldest buildings in Witney and one of the biggest in West Oxfordshire. Its origins go back to Norman times but the present building is mostly 13th century. It stands on Church Green near the town centre, and its spire is a landmark for many miles around. The church does tremendous work to support the community and is an important part of Witney life Picture: DesDubber Photography