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Casa Mary Sumner - Unión de Madres

24, Tufton Street, London, Greater London, SW1P 3RB, United Kingdom

In the bustling heart of Westminster, nestled among the historic grandeur, towering offices and relentless pace, lies a hidden gem:  Mary Sumner House – a Grade-II listed venue where history meets purpose and your meeting room booking becomes a catalyst for global change.

Mary Sumner House offers a variety of 8 meeting rooms and Conference Hall, ranging in size from 6 in a Boardroom Layout to 120 in a Theatre-style Layout, suited to a wide array of events.

Mary Sumner House offers not just an affordable, high-quality venue and flexible catering options, but also a meaningful connection to social change, as the revenue generated helps support the ongoing work of Mothers’ Union, an international charity committed to empowering women and fighting poverty, violence and injustice.

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Up to 120 guests

Conference Hall
Boardroom 48
Cabaret 60
Recepción 80
Theatre 120
U-shape 40
Mary Sumner Room
Boardroom 24
Cabaret 16
Theatre 36
U-shape 20
Queen Elizabeth II Room
Boardroom 16
Wangari Maathai Room
Boardroom 20
Cabaret 12
Theatre 30
U-shape 16
Maya Angelou Room
Boardroom 16
Cabaret 12
Theatre 25
U-shape 12
Rosa Parks Room
Boardroom 24
Cabaret 16
Theatre 36
U-shape 20
Mary Slessor Room
Boardroom 12
Theatre 15
U-shape 10
Sarojini Naidu Room
Boardroom 14
Theatre 25
Malala Room
Boardroom 6