[citation needed] These entered service in 2005 and were used jointly by Central Trains and Silverlink, both owned by National Express.

The latter class is only fitted with traction equipment for Southern Region 750 V DC third rail, whilst the Class 350/1 units can operate from either 25 kV 50 Hz AC OLE, as is done in regular service, or alternatively third rail.

[17][18] All Class 350 units built since are not equipped for third-rail use but, like most modern British EMUs, can be retrofitted if necessary.

WMT operate all of the units primarily under its London Northwestern Railway brand,[citation needed] however some units also run routes under the West Midlands Railway brand on the Chase Line.

[20] The fleet is based at the purpose-built Kings Heath depot at Kingsthorpe, which opened in June 2006.

Silverlink began operating the fleet in June 2005 between London Euston, Milton Keynes Central and Northampton.

As part of the franchise agreement, London Midland ordered 37 additional Class 350s.

[13] On 8 October 2008, the first of these was handed over to Porterbrook and carried invited guests around the Wildenrath Test Track.

[27] In addition to the existing operations, these units took over the new Crewe - London Euston service running via Stoke-on-Trent and stopping at most of the Trent Valley line stations.

[18] A further 10 four-car units were built later on in the franchise to provide additional capacity,[5][28] entering service from October 2014 as Class 350/3s.

[5][29] The first First TransPennine Express Class 350/4 services ran on 30 December 2013 between Manchester Piccadilly and Glasgow Central.

[29] The units were based at Siemens' existing Ardwick depot in Manchester, with the government providing funding for the required electrification.

Her death turned out to be suicide, as she carried a can of petrol into the toilet and locked the door.