Is the Eurostar electric or diesel?

Electric. High speed trains are always electric, and the only trains allowed through the Channel Tunnel are electric.

Eurostar is the brand name of the company running high speed trains London-Paris and London-Lille-Brussels through the Channel Tunnel.

Eurostar uses the stations: St. Pancras (London), Gare du Nord (Paris), Bruxelles Midi (Brussels) and Lille Europe.

Currently these are the only passenger trains operating through the tunnel.

The Eurostar takes 2 hours 15 minutes between London and Paris.