|Number built:||26 (2 and 3-car sets)*|
|Built:||1979-1983 (Original D78)
|Motor:||(DMU) Ford Duratorq diesel|
|Power:||800 hp (600 kW)|
The first conversion was a diesel-electric multiple unit which uses Ford Duratorq diesels. The prototype began testing in the Summer of 2016 with mainline testing beginning later in the year. Unfortunately in December the prototype unit caught fire near Kenilworth delaying the project. However the long-awaited breakthrough first order came for three units from London Northwestern Railway. LNWR have bought three two-car sets for use on the Marston Vale line  between Bletchley and Bedford. The Class 230 finally entered revenue service on this line at the end of April 2019.
Vivarail began tests of a battery powered version of the Class 230 on the Bo'ness and Kinnell Railway in late 2018 . The battery version has four 106kWh battery arrays and an operational range between charges of sixty four kilometres.
The second order for the Class 230 is for five three-car sets for the Borderlands Line (between Wrexham and Bidston) operated by Transport for Wales. These will be diesel-hybrid units and could enter service later in 2019 .
|LNWR 230 004 at Kempston Hardwick|
|230 004 at Ridgmont|
|Aboard the 230|
|230 004 arrives at Kempston Hardwick|
|The LNWR 230 retains some touches of it's LU heritage|
|230 004 at Bletchley|
* including units on order
 Underground News No. 688 (April 2019) p. 196
 Underground News No. 684 (December 2018) p. 676
 "Rolling stock challenges", Modern Railway (May 2019) p. 52