Train derailment near Lewes

[Penny Whistle]

This appears to have been caused by buckled tracks, presumably due to the heat. How does continuous rail accommodate thermal expansion ?

[Panamax]

Penny Whistle said:

This appears to have been caused by buckled tracks, presumably due to the heat. How does continuous rail accommodate thermal expansion ?

At the expansion joints. Lengthy, narrow, wedge-shaped overlaps of rail. Very different from square cut ends,