In Alexander Gorbachev v Andrey Grigoryevich Guriev [2024] EWHC 622,[1] the Commercial Court held that the claimant’s voluntary disclosure of a privileged chronology originally produced by its barrister gave rise to a collateral waiver of: (i) an updated draft of that chronology; as well as (ii) all documents containing, recording or otherwise evidencing the claimant’s instructions in respect of the chronology.

Background

The underlying proceedings concern a long-running £1 billion dispute between Mr Gorbachev (the Claimant) and Mr Guriev (the Defendant) concerning their interests in a Russia-based fertiliser company, PJSC PhosAgro.

Back in October 2012, the Claimant instructed a barrister (Mr Fitzgerald), who prepared a chronology of events (the Original Chronology) based on information given to him by the Claimant at meetings and over the telephone. Later, on 21 January 2013, the Claimant instructed solicitors, around which time Mr Fitzgerald provided the solicitors with the Original Chronology, which he then subsequently revised on 5 February 2013 (the Revised Chronology). It appears not to have been disputed in the present application that both the Original Chronology and the Revised Chronology attracted legal professional privilege.

Some almost 10 years later, the Claimant voluntarily disclosed the Original Chronology to the