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The Abacus Screen erected on Waterloo Bridge designed by architect Edward Mills (1915–98).

The Festival of Britain: 75 years later

Talk: In Person - 17/09/2026

Geoffrey Hollis will assess the impact of the Festival of Britain in the short, medium and long term – with a sigh of regret for what might have been saved for the nation had the C20 Society existed in 1951.

[online] The Festival of Britain: 75 years later

Talk: Online - 17/09/2026

Murray Edwards College: The Sixties Renaissance Symposium

External event - 17/09/2026

Join us for a one-day symposium to celebrate the 60th anniversary of the College building designed by Chamberlin, Powell and Bon.

Grosvenor House by Cotton, Ballard and Blow, 1953-55, Grate II listed. Photo by John Lord, CC BY 2.0.

Birmingham Art Deco Walk – FULLY BOOKED

Walk - 15/09/2026

Explore exciting architecture of the second city, ranging from the 1920s to the 1950s. Led by Katriona Byrne. Part of Birmingham Heritage Week.

William Mitchell's murals under the Hockley Flyover.
Photograph: Historic England

William Mitchell Birmingham Murals Walking Tour

Walk - 12/09/2026

A walking tour of the William Mitchell murals located at Hockley Circus, Hockley Flyover. Part of Birmingham Heritage Week.

Grade II listed Harlow Town Station (1960). Courtesy of Mike Ashworth.

New Towns at 80: Symposium & Tour of Harlow

Conference - 10/09/2026

Join C20 for a special two-day event in partnership with Historic England, celebrating the 80th anniversary of the 1946 New Towns Act and the launch of the late Elain Harwood’s final major publication New Towns Mark One.

New Towns at 80: Symposium ONLY

Conference - 10/09/2026

Join C20 for a special event in partnership with Historic England, celebrating the 80th anniversary of the 1946 New Towns Act and the launch of the late Elain Harwood’s final major publication New Towns Mark One.

Dome of Discovery (Ralph Tubbs, 1951), the largest dome in the world at the time.

Festival of Britain at 75: Walk – FULLY BOOKED

Walk - 09/09/2026

Retrace the footprints of long-lost architectural icons, such as the Dome of Discovery and the Skylon, while also exploring the present and future of the site. Led by Doug Black, leader of Conservation & Design at Lambeth council. 15 tickets only.

Sulkin House (Denys Lasdun, 1959) Grade II listed, Windsor House (Yorke, Rosenberg & Mardall, 1959). Photo copyright Thaddeus Zupančič.

Modernist Bethnal Green Walk – FULLY BOOKED

Walk - 05/09/2026

Back by popular demand! Explore post-war 1950s modernist architecture in Bethnal Green featuring great buildings by Berthold Lubetkin and Denys Lasdun.Thaddeus Zupančič, author of London Estates, will lead the walk.

Portmeirion (Sir Clough Williams-Ellis, 1925–1975). Photo by Martin Crampin/Yale University Press.

Portmeirion Weekend: A Centenary Celebration

Trips - 04/09/2026

C20 Cymru are hosting a trip to celebrate the centenary of Portmeirion (1925—1975), the unique site designed by Sir Clough Williams-Ellis. Sitting on the dramatic North Walian coastline, it reflects an Italianate style with its piazzas and pastel shades

Klaipėda State Theatre (A. Mikėnas, 1963), refurb by Studio GA and MAMA Architects, 2024.

Coastal Lithuania: Klaipėda, Palanga and Nida

Trips - 03/09/2026

A tour of coastal Lithuania exploring surviving Germanic and interwar architecture, as well as bold Soviet era and contemporary buildings. Led by Daumantas Patamsis with local guides.

London's Ours (Four Corners Books, 2026) and International Women's Day 1985 Poster © The London Archives.

London’s Ours: Radical 1980s campaigns by Greater London Council

Book Launch: In Person - 02/09/2026

In the 1980s the Greater London Council embarked upon a radical experiment in how to run the city, making use of poster campaigns and public art to take aim against racism, sexism and nuclear war. Author Hazel Atashroo & Rosamund Lily West discuss.

[online] London’s Ours: Radical 1980s campaigns by Greater London Council

Book Launch: Online - 02/09/2026

Grade II* listed National Theatre by Denys Lasdun & Partners (1976), London. Photo by Lukas Novotny.

London Brutalism Walk – August – FULLY BOOKED

Architecture Style Walks - 29/08/2026

Explore London’s Brutalist architecture in a fun engaging walk from the Southbank to Camden with Philip Downer. Expect world-famous monuments, lesser-known gems and celebrated estates. Part of our new outreach programme Architecture Style Walks.

Modern Buildings in Greenwich: Walk - FULLY BOOKED

Walk - 22/08/2026

Architect Ana Sutherland will lead a walk looking at buildings, by Trevor Dannat, Brian Meeking, Julian Sofaer, Gordon and Ursula Bowyer, and James Gowan. She will explain their origins, connections between their architects, clients, and the area.

Grade II listed 76 Southbank (1980–84, Denys Lasdun) recently renovated by AHMM. Photo by Rob Parish.

76 Southbank guided tour, 6pm—7pm – FULLY BOOKED

Tour - 18/08/2026

Join us on an exclusive tour of Denys Lasdun's Grade II listed former IBM building, which recently reopened after an extensive renovation by AHMM. It’s now a home to Lego and Paypal.

76 Southbank guided tour, 4:30pm—5:30pm – FULLY BOOKED

Tour - 18/08/2026

Join us on an exclusive tour of Denys Lasdun's Grade II listed former IBM building, which recently reopened after an extensive renovation by AHMM. It’s now a home to Lego and Paypal.

Spangate (Eric Lyons for Span, 1964). Image credit: The Modern House

Modern Buildings on the Cator Estate, Blackheath: Walk – FULLY BOOKED

Walk - 15/08/2026

Architect Ana Sutherland will lead a visit to a series of Span estates (1954-1984) by Eric Lyons, and houses by Patrick Gwynne, Walter Greaves and Peter Moro. She will explain the history of Span, the buildings, and connections.

Grade II listed Golden Lane Estate by Chamberlin, Powell & Bon(1952–62), London. Photo by Diamond Geezer, CC BY-NC-ND 2.0

London Modernism Walk – August – FULLY BOOKED

Architecture Style Walks - 12/08/2026

Explore London’s Modernist architecture in a fun engaging walk with architect Sarah Jackson. Expect interwar civic landmarks, trailblazing housing and celebrated estates. Part of our new outreach programme Architecture Style Walks.

Grade II listed Shell-Mex House House (now Eighty Strand) by E. Joseph (1931), London. Photo by Diego Delso, CC BY-SA.

London Art Deco Walk – August – FULLY BOOKED

Architecture Style Walks - 08/08/2026

Explore London’s Art Deco architecture from the Embankment to Holborn in a fun engaging walk with Alison Rae. Expect corporate monuments, glitzy hotels and famous West End theatres. Part of our new outreach programme Architecture Style Walks.

Left: Sky Building No. 5, aka the Godzilla Building, Youji Watanabe, Tokyo, 1971-Unknown; Takeshi Sato (Youji Watanabe Office). Right: Naha Tower Building, Nobuyoshi Kinjo + Gendai Sekkei Co., Ltd. Okinawa, 1973- 2014; Courtesy Ura-kun.

Vanishing Japan: Modern Architecture, Gone But Not Forgotten

Book Launch: In Person - 06/08/2026

American architect Naomi Pollock discusses her new book Vanishing Japan, the first visual celebration and record of Japan’s demolished post-war architectural gems.

[online] Vanishing Japan: Modern Architecture, Gone But Not Forgotten

Book Launch: Online - 06/08/2026

American architect Naomi Pollock discusses her new book Vanishing Japan, the first visual celebration and record of Japan’s demolished post-war architectural gems.

Islington Square (2021) by CZWG. Photo copyright Leonardo Saccucci.

Remaking the Angel: walk – FULLY BOOKED

Walk - 01/08/2026

A circular tour of the Angel Islington with Alec Forshaw, former Principal Design and Conservation Officer with Islington Council, looking at how the area has been regenerated over the last 40 years.

Grade II* listed No 1 Poultry by James Stirling, Michael Wilford and Associates (1985-98), London. Photo by Alastair Rae CC BY-SA 2.0

London Postmodernism Walk – July – FULLY BOOKED

Architecture Style Walks - 29/07/2026

Explore London’s Postmodern architecture in an engaging walk from Clerkenwell to the City with Mark Bessoudo. Expect bold and colourful buildings and learn about the hidden references in them. Part of our new outreach programme Architecture Style Walks.

Marks & Spencer (1929) by Trehearne & Norman. Photo by Matthew Andrews for SAVE.

All change on Oxford Street: walk

Walk - 26/07/2026

Learn the history and future of the ‘nation’s high street’ through its best architecture in a walk led by Alec Forshaw. After the decades-long battle, the street should be pedestrianised by the time our tour takes place – hopefully!