Until recently, British Rail was probably the holder of the most stupid excuses for train cancellations or delays, with ones like these, which are now well-known throughout the UK:
"leaves on the line"
"the wrong kind of snow"
and more recently, a lesser known one about
"a cow on the line"
But today, on the travel news, a company has really excelled itself, The reason for delays?
"a tree had fallen on the track"
This doesn't really sound very remarkable, until you realise that the company in question is London Underground.