yes, but WHERE is the supermarket going to be? I can't think where in Waterloo there would be space for a supermarket? It seems a bit far-fetched to me and the Standard has gone downhill since beoming a freebie. Perhaps they've just made it up!
I remember seeing a development plan a couple of years ago that showed a supermarket on the corner of Waterloo Road and Baylis Road - where the Book Warehouse, Da Vinci's etc is now.
I don't understand how that would affect the re-opening of the platforms for the international terminals, though.
My only other thought is that the space below the platforms might be converted. I understand (although I can't remember where I read it) that if the ex-Eurostar platforms are brought into use, access will be from the concourse level, so the old sunken check-in, security and departure lounge areas, with their service spaces, would be available.