The new Great Western Railway IEP class 802 has been seen in Dawlish
It will compete similar return journeys throughout the rest of Wednesday and Thursday as it undertakes a series of test runs.
See more...http://www.devonlive.com/news/devon-news/brand-new-great-western-railway-779303
@ShyTalk 47 - air cons on the roofs and diesel engine generators under the carriages, i believe.
Brand new GWR green IEP at London Paddington:-
https://www.youtube.com/watch?v=XoNV2oo4_os
https://en.wikipedia.org/wiki/British_Rail_Class_800
Read the comments on this link from people who know what they are talking about :-