Well I supposed it depends on when you intend to travel.
In the summer the trains are cancelled because the heat buckles the tracks.
In the autumn the trains are cancelled due to leaves on the lines.
In the winter the trains are cancelled due to the wrong type of snow.
Second of the Die Hard series movies, Fictional British airline Windsor Air, their slogan - Just like British Rail, We maybe late but we get you there. Irony of it is that plane crashes in the movie no survivors.