What is oldest catholic church london?

The oldest Catholic Church in London is the Brompton Oratory, also known as the Church of the Immaculate Heart of Mary. The church is located in the Brompton district of Kensington, within the Roman Catholic Diocese of Westminster. The church was built in the 1880s and has been an important centre of Catholic worship in London for over 140 years. It is known for its impressive architecture, including the high altar decorated with mosaics and statues, and its impressive collection of works of art. Today, the Brompton Oratory continues to be a place of worship and is a popular pilgrimage site for Catholics and visitors alike.