Rona specialises in UK and EC competition and merger control law. She advises UK and international clients on the wide range of competition law matters, including of anti-trust litigation.  She is recognised as a leading practitioner in her area and was acclaimed as one of the Lawyer's "Hot 100" for her contributions.

Her clients span a variety of sectors, including comprehensive experience of advising in the retail and consumer sector for over 20 years.  She also regularly advises in regulated sectors and co-leads the firm's Water Group.  She is recognised by Legal 500 as a leading individual in that area. 

Rona's case highlights include:

  • Advising on the CMA’s review of cost of living pressures in the grocery sector and subsequent investigation into supermarket loyalty cards
  • Advising Co-op on phase 1 clearance of its disposal of its petrol forecourt business to Asda
  • Advising Co-op on a grocery code investigation
  • Advising Samworth Brothers on various acquisitions of convenience sector brands
  • Regularly advising on complex retail sector commercial arrangements including joint buying and franchising.  
  • advising clients in antitrust enforcement cases (pharmaceuticals, airport parking, bunker fuels, dairy, tobacco, toys)
  • regularly advising clients in CMA and other market investigations, including Co-op in the Funerals Market Investigation and GCA investigation
  • securing clearance for numerous complex mergers including between YPO/Findel; Samworths/2Sisters (Sandwich business); Harrogate Water/Danone; Derby Teaching Hospitals Foundation Trusts/Burton Hospital Foundation Trust
  • advising on competition litigation including damages claims and applications for injunctive relief
  • advising on complex, cutting edge, regulatory questions in the water sector including on direct procurement, market opening, mergers
  • French - Good command
  • Hebrew - Good command

"Clients say Rona Bar-Isaac is strong in all areas. She has experience in a range of matters including investigations and damages cases and has sector expertise within the regulated industries, including water and telecommunications." Chambers (2015)

"Rona Bar-Isaac is regularly called upon to advise on market investigations. Clients report that she has a strong knowledge of competition law and an eye for detail." Chambers Europe (2015)

"Widely acclaimed as a rising star in this area." Chambers (2013)

"Commercial and practical." The Legal 500

Professional Memberships
  • The Law Society