King & Wood Mallesons’ (KWM) European arm has filed for administration, in a move that represents the end of the line for the legacy SJ Berwin business and the biggest ever UK law firm collapse.

After a protracted and delayed process as management attempted to secure deals with other firms, restructuring and recovery boutique Quantuma has been formally appointed to handle the administration. Partners Andrew Hosking and Sean Bucknall were appointed joint administrators at the High Court in London this afternoon.