4 October 1926: After the opening ceremony the Imam called the faithful to prayer from the minarets high over the roofs of suburbia

Fleet Street, Sunday
There was a strange meeting of East and West at Southfields this afternoon, when the first mosque to be built in London was opened. The mosque, a graceful little building with a dome in concrete, is placed close to the District railway and in the midst of suburban villas. After the ceremony the Imam called the faithful to prayer from the minarets high over the roofs of suburbia. It is built altogether with steel and concrete, and, unlike the Eastern mosques, it has windows, as a concession to our climate. The architect is Mr. J. H. Mawson, of Lancaster, who, with his father, the well-known town planner, was able to study the architecture of mosques during the reconstruction of Salonika. It is in its incongruous surroundings a thing of beauty.

Reference: https://www.theguardian.com/world/2016/oct/04/fazl-first-mosque-london-opening-southfields-1926