Pop-up shops will be rolled out across tube stations as Transport for London uses its vacant retail space for new purposes.

Old Street, Piccadilly Circus, Baker Street, St James‘ Park will feature pop-ups for millions of people who use the tube every day.

The short-term letting deal, struck up with online property agency Appear Here, will begin with 15 spaces at pop-up capital Old Street and launches at the end of April.

“Pop-up shops have proved extremely popular for us,” explained Graeme Craig, Director of Commercial Development for TfL. “The partnership will enable us to make the most of our retail assets whilst generating revenue we can reinvest into improving the transport network.”

Appear Here says annual footfall at Old Street is 23m a year, while Piccadilly station is an impressive 43m.

TFL previously used a vacant unit to sell Nike special edition trainers at pop-up store inside Piccadilly station in December last year. It introduced its first pop-up shop in November 2013 with PAPER London, a fashion retailer, taking over TfL‘s retail space on South Molton Street.