The strange part is the quote in the press release
"Malcolm Brown, CEO, Angel Trains, commented, ...... These units will provide a complementary option to the building of brand new trains.Its also worth highlighting the importance of having high quality, lower cost options such as the re-engineered Class 317 for use on sections of the national rail network
which are due to be newly electrified. The modernisation work which has taken place on these trains makes commercial sense but it also supports jobs and skills in the UK rail supply chain, continued Brown."
"Rail Minister, Stephen Hammond said: "We are currently embarked on one of the biggest programmes of rail modernisation ever, with more than £38billion being invested to electrify hundreds of miles of track, open new stations and improve the connectivity of hundreds of towns and cities across the network."
So I can understand testing them on an existing network, but if they are surplus why not move them North to the area that clearly both these quotations refer too?
Full press release below.
http://www.angeltrains.co.uk/Portals/0/News_Downloads/Class 317 launch press release 28_11_2013.pdf