From The Metro:
"Everything is late at Waterloo because they slowed trains down to as little as 20mph to avoid buckling the rails," said travel expert Simon Calder.
"Thirty degrees is not something that should trouble infrastructure, but it’s very frail. The Victorians built it and we are doing what we can."
Most of the planning and layout is from the 19th century, but the actual rails are replaced every ten years or so, so this is a pretty pathetic excuse.
