Nereus, on the other hand, uses rechargeable lithium-ion batteries, similar to those used in laptop computers, for power and a single hairs-width fibre optic cables - borrowed from Torpedoes - for control and telemetry.

BBC: Robot sub aims for deepest ocean

Treviso demonstrated from the off that they intended to play with pace and width but from the first scrum Leicester began to butcher the home pack and their forward power laid the ground work for the victory.

BBC: Treviso 16-60 Leicester