Bidding war for burger chain Byron The owner of Yo Sushi is battling rival private equity firms to acquire Byron, the upmarket burger chain, for £100m. Quilvest, which acquired the sushi chain in 2008, and Searchlight Capital Partners are understood to be among a few private equity houses through to the second-round of bids for Byron. Silverfleet Capital looked at the 30-restaurant chain but did not submit a bid. Byron is owned by Gondola Holdings, which put the burger operator up for sale recently by teaming up with corporate finance advisers at DC Advisory. The burger specialist is expanding rapidly and is forecast to post underlying profits of more than £10m this financial year. Gondola, which is controlled by the private-equity firm Cinven, also owns the Pizza Express, Zizzi and Ask chains. Tom Byng founded Byron in 2007 after four years in the US during which he ate "enough hamburgers to sink the Titanic."