Celebrate the centenary of London Underground’s Camden Junction tunnels

This Saturday (20th April) marks the centenary of one of the London Underground’s most impressive engineering feats. Despite thousands of people using it every day, hardly anyone ever gets to see it in its full glory.
Reproduced with kind permission of Dan Dare Corp Ltd.
This is Camden Junction, the massively complicated set of tunnels that linked the two branches of the Northern line and they carried their first passengers on 20th April 1924.
The junction owes its existence to a number of