London is the starting point for a number of motorway routes. The M25 is an orbital motorway which enables vehicles to avoid travelling through central London and is one of the busiest motorways in Europe.
The current route of the London section of the A1 road was mainly designated as such in 1927. It comprises a number of historic streets in central London and the former suburbs of Islington, Holloway and Highgate and long stretches of purpose-built new roads in the outer London borough of London Borough of Barnet, built to divert traffic away from the congested suburbs of Finchley and High Barnet.
The London section of the A1 is one of London's most important roads. It links North London to the M1 motorway and the A1(M) motorway, and consequently serves as Central London's primary road transport artery to the Midlands, Northern England and Scotland. It also connects a number of major areas within London, and sections of it serve as the High Street for many of the now-joined villages that make up north London.
Charles Henry Holden (12 May 1875–1 May 1960) was an English architect best known for his designs of some of the 1920s and 1930s stations on the London Underground, but who was already a distinguished architect before then, notably for his Imperial War Graves Commission cemeteries in Belgium and northern France.
Many of Holden's later designs for Underground stations went unrealised or were scaled back because of World War II with only East Finchley representative of a series of stations planned for the cancelled extension of the Northern line to Bushey Heath and with stations on the Central line's extension into east London being scaled back by post-war austerity. Modestly believing that architecture was a joint effort, Holden twice declined the offer of a Knighthood.