The City Architecture Forum is a membership group for anyone interested in the architecture, urban design, public realm and planning of the City of London.

Next Event

Tour: One Leadenhall Street

Tuesday, 25 November 2025, 3:30 pm - 5:00 pm

One Leadenhall Street , 1 Leadenhall Street, London, EC3V 1PP

One Leadenhall Street is the latest addition to the City Cluster.

Join the City Architecture Forum on 25th November 2025 for an introduction to the newly completed building by Ken Shuttleworth of Make Architects and a tour of the building to include the 4th floor public terrace overlooking the adjacent Grade II* listed Leadenhall Market.

Developed by Brookfield and built by Multiplex, the 35-storey building provides 430,000 sft of new Grade A offices and a major US law firm made an early commitment to pre-let circa 200,000sft of the new space.

Don’t miss this chance to explore one of the City’s landmark new completions!

Insights

City Architecture Forum: Annual Dinner 5 November 2025

By Lee Mallett

Read the report on our Annual Dinner 2025 with guest speaker Tom Sleigh, Chair of the City’s Planning and Transportation Committee, and Robin Dobson, CEO of Platform4...

Reflections on the Talk: 85 Gracechurch Street

By Matthew Thomas

Architecture is at its most compelling when it not only responds to context but actively reshapes it, carrying the past into the present while opening doors to the future. Last Tuesday’s talk on 85 Gracechurch Street delivered on this, offering an inspiring glimpse into a landmark scheme that sits at...

TBC . London: going for green and social impact

By Lee Mallett

What is probably the best view of the City core’s cluster, CAF members agreed on their recent tour, is now available from the northern roof terrace of TBC.London – an environmentally and socially impactful remodelling of an unlovely 1980s building at 224-226 Tower Bridge Road, south-east of Tower Bridge that...

‘Destination in the sky’ – One Undershaft

By Lee Mallett

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The sudden emptying of streets in the Pandemic meant ‘we started to think harder about the human elements of the City in that pause’, said Eric Parry, newly minted CBE in this year’s Birthday Honours, introducing One Undershaft to Forum members and guests at his practice’s Old Street offices. Having...

Mid Year Review 2025: Reading the heartbeat of the Square Mile

By David Magyar

As I pondered possible themes and topics for this half year report, I cast an eye over the events we have held in the first six months of 2025 and began to think about what linked them, and how they characterise what the Forum aims to do. The roster –...

40 Leadenhall: More of the Metropolis

By Richard Golding

Image courtesy of Make Architects On a sun-drenched afternoon in early April, members of the City Architecture Forum filtered through the thirsty Leadenhall Market to arrive at an exclusive tour of 40 Leadenhall. A striking and unavoidable new presence on the City’s skyline and one of the most ambitious commercial...

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There is no better place, if you want or need an introduction to the City’s built environment and to the ideas of those who shape it than the City Architecture Forum.