Adjoining the Westminster Abbey, the church was built at the beginning of the 12th century so that the locals have a place where they can pray without disturbing the Monks in the Abbey. It was demolished in the 14th century but restored several times since then.
The church features 16th-century windows and an early 19th-century organ. Together with the Houses of Parliament and the Westminster Abbey, it was designated a UNESCO World Heritage site in 1987.
Mon - Fri: 9:30 am - 3:30 pm
Sat: 9:30 am - 1:30 pm
Sun: 2 pm - 4:30 pm
Free entry.
Wikipedia https://en.wikipedia.org/wiki/St_Margaret's,_Westminster
Official website http://www.westminster-abbey.org/st-margarets
Phone +44 20 7654 4840
Address St Margaret Street, London SW1P 3JX, UK
Coordinates 51°29'59.433" N -0°7'36.267" E