The store, which follows a string of openings in Basingstoke, Exeter and Walton on Thames, opened at the Queens Arcade Shopping Centre and stocks the entire Triumph collection and brands Sloggi and Valisere.
Triumph national retail manager Mark Hayes said: "We are sure that shoppers here will love the new spring collections and appreciate the premium service we offer. Our specialist team will be fitting bras and briefs and advising on the right style. So many ladies wear the wrong size, mostly with bra cups too small and pants too tight. They just don’t realize how much better they could look and feel."