Collisions resume in revamped LHC

The Large Hadron Collider is again smashing protons, now at record new energies, and delivering data to physicists.

It has been out of operation for two years while the massive machine was upgraded.

This animation comes courtesy of Cern, the European nuclear research organisation that runs the LHC.

It shows "bunches" of protons circulating in the collider's 27km main ring and colliding within its four big experiments - Alice, LHCb, CMS and Atlas.