Three leading international law firms have been left wondering whether they are the subject of an elaborate April Fool’s prank, after seeing a raft of senior London partners all walk out on April 1.

As reported by Legal Week, Jones Day‘s London managing partner Russell Carmedy and European private equity head Michael Nouril have both handed in their notice; DLA Piper‘s global co-head of litigation and regulation Neil Gerrard and its Europe, Middle East and Africa (EMEA) head of corporate crime and investigations Jonathan Pickworth have quit for Dechert; while the London headquarters of U.K. firm Ashurst has been rocked by the resignation of all three of its London-based U.S. securities partners.