A brand new pair of GWR's de-wiring units! Less than a week after classmate 802016 disgraced itself by ripping down 500 metres of overhead wiring, when the pantograph was raised at too high a speed, or when it was still partly strapped down (according to which source you believe), they are taking no chances here, as yet to be introduced 802018 & 802017 move slowly along the up relief line at Grove, under adverse signals, with the 5Z20 09:10 Stoke Gifford to North Pole IEP Depot test run on 22 October 2018.