medium-distance services between London Liverpool Street / Stratford and Broxbourne / Hertford East and on longer distance services between London Liverpool Street/Stratford and Bishop's Stortford, Harlow Town and Cambridge. They are also used on some Bishops Stortford/Stansted Airport - Cambridge services. These trains are also being used on rush hour services from Liverpool Street to Witham and Ipswich due to the absence of some class 321s being refurbished. There is also one class 317/7 demonstrator unit 317722 which is the only Class 317/7 with Greater Anglia. This unit has now been withdrawn and stored.