The speakers have been checking out the masts and towers which help transmit radio and TV programmes – why they’re so tall and how they’re built. They’re going to need a head for heights!

A Garden to the Guildhall: a free Time Hunters history walk around the City of London
44:19

A Bridge to the Barbican: a free Time Hunters history walk around the City of London
50:06

The Great Fire Trail: a free Time Hunters history walk around the City of London
1:02:38