Bevin Court
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Bevin Court is one of several modernist housing projects in London designed in the immediate postwar period by the Tecton architecture practice, led by Berthold Lubetkin. Following the dissolution of Tecton, the project was realised by Lubetkin, Francis Skinner and Douglas Carr Bailey. The project was completed in 1954. (Wikipedia)

Hidden around a corner on a side street not far from Kings Cross can be found one of Britain’s great post-war modernist buildings — and an amazing staircase.
Staircases are a curious thing, they permit access between floors and have to be convenient to use, and safe to use, but are either bland to the point of pointlessness, or tours de force of architectural design.
Bevin Court firmly sits in the latter category.
Fascinating blog post by Ian Mansfield about the history of Bevin Court and the socialist architect, Berthold Lubetkin. 
From Clerkenwell 101 

56 The Bevin Court, north of Clerkenwell Green, is a strikingly Modernist, Grade II Listed housing estate built by the famous Russian architect Berthold Lubetkin. By the time the first block was completed in 1953, the Cold War was well under way and the original plan to name the estate after Lenin was abandoned so it was named after the union leader and Labour politician Ernest Bevin instead. Luckily, Lubetkin and his team only needed to change two letters on the sign at the entrance.

Percy Circus area - Survey of London

Bevin Court, Holford House and Amwell House
The ensemble represented by Bevin Court and its lesser outliers, Holford House and Amwell House, with the space between them (Ills 278, 279), was the last major project masterminded by the architect Berthold Lubetkin for Finsbury Borough Council. Originally known as the Holford Square Housing Scheme, it differs from its predecessors at Spa Green and Priory Green in having been designed and erected in its entirety after the Second World War. Though planning began under the aegis of Tecton, Lubetkin's original practice, the bulk of the work fell to his successor firm of Skinner, Bailey and Lubetkin. Construction took place between 1951 and 1957.