On the tube, why are there only a finite number of reasons for delays with
very little explanation (and often different reasons at different
stations)?

I used to trap these for national rail to text myself when there were
problems, and shortened them. This is what I had logged, maybe the tube ones
are similar or the same.

Cheers,
Dave

This is due to faulty freight train Londonbound causing delays.
This is due to suspected hot axle box.
This is due to no resources.
This is due to losing time on route.
This is due to door fault on train.
This is due to adhesion problem to inward stock.
This is due to reports of a bridge struck by a road vehicle.
This is due to extended engineering works.
This is due to an earlier train failure.
This is due to an earlier broken down train.
This is due to waiting for a train crew member.
This is due to waiting for a driver.
This is due to a signalling problem.
This is due to an earlier signalling problem.
This is due to weekend engineering work.
This is due to an earlier fault on the train.
This is due to unit vandalized.
This is due to vandalism.
This is due to earlier vandalism.
This is due to reports of vandalism.
This is due to an incident on the train -
This is due to an earlier security alert.
This is due to an earlier police matter.
This is due to earlier engineering works.
This is due to weekend engineering work
This is due to an earlier cancellation.
This is due to a fault on the train.
This is due to a technical fault on the train.
This is due to an earlier technical fault onboard.
This is due to speed restrictions imposed by Railtrack.
This is due to the preceding train being delayed
This is due to the preceding train being cancelled
This is due to no driver being available
This is due to no drivers relief.
This is due to no driver.
This is due to a delay on the previous journey.
This is due to a broken down train.
This is due to driver shortage.
This is due to a shortage of drivers.
This is due to a shortage of units.
This is due to stock shortage.
This is due to waiting for carriages to form the train.
This is due to ate arrival inwd stock.
This is due to late arrival inward stock.
This is due to a points problem.
This is due to an earlier points problem.
This is due to late running re weather.
This is due to late running.
This is due to severe late running.
This is due to driver on PNB.
This is due to following troubled
This is due to earlier emergency track repairs.
This is due to a slow moving freight train.
This is due to poor rail conditions.
This is due to fitters attention to unit.