Rhiannon advises clients on all aspects of European and German antitrust and merger control, in particular with regard to M&A projects.

Her practice also covers abuse of dominance and cartel investigations, compliance training and competition law related questions arising in day-to-day business. She represents clients before the European Commission, the German Federal Cartel Office, as well as before the European and German courts.


  • Admitted to bar 2019
  • Solicitor in the Republic of Ireland since 2018 (not practising)
  • Trainee Solicitor, Slaughter and May, London and Brussels (2009 – 2011)
  • Associate, Slaughter and May, London and Brussels (2011 – 2014)
  • Solicitor in England and Wales since 2011
  • University of Durham
  • Albert-Ludwigs-Universität Freiburg (Erasmus scholarship)
  • College of Law, Chester
  • BPP Law School, London


  • Venture into the Unknown? The Exchange of Information Within Joint Ventures under Article 101 TFEU, Journal of European Competition Law and Practice, OUP (published as advance article on 1 October 2020)
  • Mind the gap? An analysis from a German competition law perspective of the European Commission’s proposal to review non-controlling minority shareholdings under European merger control law, International Review of Intellectual Property and Competition Law, 2016, 47(5), 595-616 (together with Anja Balitzki)
  • European Merger Control: Is it really relevant outside Europe? An overview of the European merger control regime and its relevance to global M&A transactions, International Bar Association, 15th Annual International Mergers and Acquisitions Conference, 7-8 June 2016 (together with Thorsten Mäger)