Byron, the Gondola-owned gourmet burger chain, has secured a further two sites in London, at the O2 and in Westminster, M&C Report has learnt.

The company, which was taken off the market earlier this summer, has secured the former Slug & Lettuce at O2 for an opening this December and the Ozer restaurant and bar in Langham Place for an opening next March.

Last month, the Tom Byng-led chain secured a unit in Hammersmith Grove for what will become its 35th site in total and 30th in the capital when it opens in November.

The group is also believed to be in talks on sites in Milton Keynes and Bristol and expects to have 45 units in operation by the end of next year.

It has already secured a site on the Strand for an opening in early 2014.