High speed testing
As with other heritage railways, the SVRSevern Valley RailwaySVRA:Severn Valley Railway AssociationSVRS:Severn Valley Railway Society operates normal services at a maximum speed of 25 mph under its Light Railway Order and Safety case. The SVRSevern Valley RailwaySVRA:Severn Valley Railway AssociationSVRS:Severn Valley Railway Society and Great Central Railway have permission to operate non-passenger carrying trains at higher speeds under certain controlled conditions.
Class 175 'Coradia 1000' diesel multiple units 1999-2000
From 1 August 1999 the speed limit was increased to 50 mph to allow commissioning of Alstom's new Birmingham-built units, owned by Angel Trains and destined for First North Western. A special temporary shed with a pit road was built for the purpose outside the Carriage Repair Works at Kidderminster. Prominent notices were in place on rights of way by the previous April to warn the public of the increased speeds, and testing took place at night while no other trains were in service.Three-car unit 175 101 arrived in August 1999, fitted with test instrumentation, and clocked up a few thousand miles of test running. Two-car 175 001 was fully fitted-out. It moved from the SVRSevern Valley RailwaySVRA:Severn Valley Railway AssociationSVRS:Severn Valley Railway Society to Chester depot behind 47 775 on 10 January 2000.
High speed testing between Bewdley and Kidderminster
In more recent years testing is restricted to the section between Bewdley and Kidderminster. The railway's policy during high speed testing periods mandates there is no lineside access and restrictions are published in the Traffic Notices, on SVRLive and the SVROnline intranet. Examples of high speed testing include the following (incomplete list):
- 2012: Newly overhauled Metropolitan Railway E Class 0-4-4T No. 1 underwent running in trials between 28 and 30 November 2012 in preparation for the 150th Anniversary of the Metropolitan Railway in 2013. Test runs using three Mark 1 carriages were completed at 25mph, 30mph, 40mph and finally 50mph.
- 2015: LMSLondon Midland & Scottish Railway StanierWilliam Stanier, Chief Mechanical Engineer (CME) of the London, Midland and Scottish Railway 1932-1944 Royal Scot 7PThe British Railways system of classifying steam locomotives by power using a number from 0, least powerful, to 9, most powerful, followed by either F for freight, P for Passenger or MT for Mixed Traffic. Class 4-6-0 46100 Royal Scot undertook running in after overhaul from 9 September 2015.
- 2016: Recently converted locomotives 73951 and 73952 ran test trains in July 2016 between 1900-2300, after the end of daily services.
- Train testing.com (Retrieved 20 April 2018)
- Class 175 Chronicles (Retrieved 20 April 2018)
- Buckinghamshire Railway Centre stockbook (Retrieved 20 April 2018)
- SVR Forum
- SVR Forum