The Hertford Loop is a commuter network out of Moorgate and London Kings Cross. Services from Moorgate to Welwyn Garden City and Stevenage currently run at a 30 min frequency, these being operated by the recently introduced Class 717. The total distance for the route is just short of 55 miles. Now I've mentioned the 717, onto the stock for the route Stock Class 717 in GN White livery Class 387 in GN White livery or debranded Gatwick Express Class 800/801 in LNER livery Possible Future DLC Class 700 in Thameslink livery Class 313+365 'Capital Connection' pack Class 43 'HST' in Ex- VTEC (LNER) livery