adhesion

It said it had deployed a team of inspectors to the site and on initial inspection found evidence that wheel to rail adhesion was relatively low, suggesting the train may have entered into wheel slide when braking.

It said low adhesion would be an area of ongoing investigation.

He says: “You have a steel wheel on a steel rail and anything that causes low adhesion can be a big problem.”

“The contact size between the wheel and the rails is as small as a 5p piece. So 10 months of the year rail is environmentally friendly because it requires so little energy to move, but then in autumn we have this low adhesion.”

The researchers' fruit fly model integrates the numerous signals that orchestrate cell movement, contraction, adhesion and proliferation.