Mayer Brown, CMS and Berwin Leighton Paisner (BLP) have secured top mandates on the £1.3bn sale of 20 Fenchurch Street, better known as the 'Walkie Talkie'.

The deal is the largest ever single-building transaction in the UK.

The building has been bought by LKK Health Products Group, a division of Hong Kong-based food company Lee Kum Kee Group.