This trains delays seem to get dumped down to either a signal failure or non maintenance of a flail strip.
What the hell is a flail strip?
What the hell is a flail strip?
An area of up to 5 metres from the running rail which is clear of foliage (so it doesn't "flail" any services passing through that area). This is distinct from "gauge", which (I believe) is more to do with hard structures.
Somehow, I wouldn't want to be flailed by a bridge.