The trains to the Cheltenham Races are standing room only, even in first class. Potential flooding at Cowley Bridge could cut off all of Devon from the network. Emma uses thermal imaging to inspect the lines for defects from a helicopter. Mark must evict a Traveller community from Network Rail-owned land.

The wedding of the year is fast approaching, and rail staff have their work cut out to get the station ready for the arrival of thousands of royal fans. From crowd control barriers to decorative bunting, there is plenty to be done, and security will be paramount.