The ADL class is a class of diesel multiple units that were last operated by Auckland One Rail on the suburban rail network in Auckland, New Zealand. Originally built in the early 1980s by A Goninan & Co for Westrail of Western Australia, they were sold in 1993 by Westrail's successor, Transperth, to New Zealand Rail. The units are currently owned by Auckland Transport, and were withdrawn from service in August 2022 and transported to Glenbrook Vintage Railway and Pukeoware depot for storage.

UGL Rail is an Australian rail company specialising in building, maintaining and refurbishing diesel locomotives, diesel and electric multiple units and freight wagons. It is a subsidiary of UGL and is based in Melbourne, with a staff of 1,200 across Australia and Asia. It operates factories in Broadmeadow, Maintrain Auburn, Spotswood and Bassendean. While it used to operate a factory in Taree, the plant was shut down and the equipment sold off.