The morning program is 43 minutes long, but the repeat in the evening at 2130 is a shortened version of the morning's programme lasting about half an hour.
Alternatively the 45 minute version is available as a podcast from the BBC later on the day of transmission for thirty days.
http://www.bbc.co.uk/programmes/b006qykl
This is what the Beeb has to say about it:
- Melvyn Bragg and guests discuss Isambard Kingdom Brunel, the Victorian engineer responsible for bridges, tunnels and railways still in use today more than 150 years after they were built. Brunel represented the cutting edge of technological innovation in Victorian Britain, and his life gives us a window onto the social changes that accompanied the Industrial Revolution.