According to Reuters, the EC is waiting for a response from British authorities following an official complaint from Alstom received on October 19.
"In order to clarify alleged violations of EU public procurement law we sent an administrative letter to the UK authorities on October 26," says Ms Chantal Williams, a spokeswoman for EU Internal Market Commissioner Michael Barnier. "We will decide on the next steps once we get a reply," adding that this was "standard procedure."
Last month the EC said that on the basis of information provided by Alstom it could not find fault with the manner in which Eurostar selected Siemens for the order. It also said that the ongoing review of Channel Tunnel safety regulations was not an EU matter stating that only the Anglo-French Intergovernmental Commission (IGC) was responsible for amending the rules.