Part 4 of the East Coast Express series. Now you can run Hertford Loop independently from East Coast Express part 1 as it includes the stretch of track from Kings Cross to Hitchin.
If you have part 1 installed it will automatically join the route. New locomotives include the Class 365 and the 313, both running specifically on the Hertford Loop. 10 new activities feature the whole timetable and run through the varying seasons of the year.