An Allen & Overy antitrust partner is leaving to join Kirkland & Ellis in London, in the latest major move in a busy lateral hiring market.

Alasdair Balfour is joining Kirkland & Ellis in London, a Kirkland statement on Thursday said. His hire replenishes recent losses to the firm’s London competition team, including Annie Herdman who left for Ropes & Gray in February and Sarah Jordan, who moved to Goodwin Procter in January.