Sky News and other outlets apparently reprinting the PR say:

“St Pancras is London’s Grand Central Station,” Ewan Venters, chief executive of Fortnum & Mason, said.

“It’s a great opportunity. We feel the centre of gravity in London is moving north and east from Piccadilly.

“Thirty-five million people a year go through the station, and nearly a quarter of those people are going there to shop rather than to travel.”

I don’t know whether to laugh or cry.  25 jobs created apparently.