Bovine Line

Martin, in his latest blog entry reminded me of a recent train announcement I heard while going to Croydon on the train.

"We are sorry for the delay to this service but it was due to a cow on the line..."

that's fair enough, bit odd but you can let them off i spose. but...

"...between Birmingham New Street and Birmingham International"

Now what on earth is a cow doing on a train line in the middle of Britain's 2nd biggest city? Any suggestions?