Cadwalader Wickersham & Taft veteran Tom O’Riordan is to join chambers 4-5 Gray’s Inn Square, just one year after he returned to the US firm’s London arm from investment bank Nomura.

O’Riordan, who qualified as a barrister in the UK in 1993 and is also Irish and US-qualified, joins the 43-tenent set on Monday (6 June).