Leeds Loop (Part 3 of the East Coast Express Series) integrates perfectly with East Coast Express Part 2, so that you can travel from Peterborough to York and then around the Leeds Loop. Acting also an independent Train Simulator expansion product, stations include Doncaster, Bentley, Adwick, South Elmsall, Fitzwilliam, Sandal & Agbrigg, Wakefield Westgate, Leeds, Cross Gates, Garforth, East Garforth, Micklefield, Church Fenton, Ulleskelf and York. The direct line from Doncaster to York is also included. Some sections of the line feature up to four tracks with some being dedicated slow lines.

Leeds Loop (Part 3 of the East Coast Express Series) also makes full use of all of the rolling stock available with East Coast Express 2: A4 Mallard with Railtour coaches plus the Class 89 locomotive; GNER locomotives and coaches, the Class 225 and 43, freight wagons plus Mark 1 & 2's. Used as an individual product only, without the benefit of East Coast Express Part 2, rolling stock includes the original East Coast Express models Class 43 HST, Class 220 and Class 91 with the Class 321 and the Class 158 being unique to Leeds Loop.