Clifford Chance (CC) and Berwin Leighton Paisner (BLP) have won lead roles on a major City real estate deal which has seen the ownership of Allen & Overy’s (A&O) City headquarters change hands.

CC advised Hammerson and Oman Investment Fund (OIF) on the deal, which saw the pair sell their 25:75 joint venture – whose principal asset is the long leasehold interest in the Bishops Square offices in London’s Spitalfields – to JP Morgan Asset Management.