Great Western Railway Class 802 802101 at Camborne 6/10/18

[@abhishekmohan2594]

Is this an electric train? I can't see wire overhead.
It doesn't look like a diesel powered train.

[@BensPlanesTrainsProductions]

In Cornwall it's running diesel, the pantograph is at the rear coach & front coach.

[@carailphotography]

It's a bi-mode train, capable of running on a diesel engine where OHLE is unavailable, and capable on running from the 25kV AC system which now runs the majority of the length between Bristol and London