Back in 2014, the first three parts of this documentary series revealed the incredible challenges faced
by the engineers and construction teams involved in the creation of London’s high-speed railway Crossrail, Europe’s biggest engineering project in development.

Now cameras return to catch up with the project in a new two-part documentary.

Ten brand new stations need building in central London, more than 30 miles of track have got to be laid, and a fleet of 66 200m-long trains needs constructing… not much to do, then!