In a joint statement, the pension funds said that they have initiated a strategic review of their ownership of HS1 Ltd “following a number of investment enquiries from third parties.”

A financial advisor will now be appointed although no specific timetable has been set for the review, which may conclude with no action.

The consortium of Ontario Teachers and Borealis Infrastructure acquired HS1 Ltd from Britain’s Department for Transport and London & Continental Railways in November 2010. The line was completed in two phases in 2003 and 2010 and is used by Eurostar international passenger services, Southeastern domestic services, and freight trains.