, founded in Newcastle in 1882, is the largest independent department store group in the UK with stores in London's New Bond Street and Brent Cross, Newcastle, Leicester, Windsor, York, Canterbury, Tunbridge Wells, Bentalls, Kingston upon Thames and Bracknell and Williams & Griffin
The new wi-fi service will be available from May 2013.
Shoppers simply enter their email address to log on via any wireless-enabled smartphone, tablet or PC.
Mark Fenwick, Chairman, Fenwick Ltd said: "This partnership with BT is an important step in our on-going commitment to provide greater customer service."
is a key enabler of that and we are delighted to be working with Fenwick
to marry a traditional shopping trip with digital channels, such as search and social networks, to improve the shopper experience."