looking at the long term graphs7 Aug 2019 20:43
Seems like both bt and centrica are going down the plughole!
The addage time in the market not timing doesnt seem to always wash,most companies have a lifespan before some kind of negative missile hits them eg a disruptor(4g/5g,solar panels),macro economic tsunami,poor management,a change in fashion.
Times change and economic moats dry up if management sit on their laurels .
Imo Woodfords undoing was sitting on companies with moats for too long.