Una Deretic focuses on mergers and acquisitions for both private and listed companies, group reorganisations and restructurings, joint ventures and equity financings, as well as providing general corporate advice. She has considerable international experience, having advised on numerous deals with cross-border elements, and is well versed in project managing complex transactions involving foreign jurisdictions. Una also has particular experience in advising clients on a range of corporate transactions in the retail/consumer and natural resources sectors.

In addition, Una regularly advises on a range of debt financing transactions, frequently with cross-border or offshore aspects, including general corporate and real estate lending, invoice discounting and Islamic debt finance transactions.


Prior to joining Armstrong Teasdale, Una was a corporate law partner at Kerman & Co. in London, where she worked for more than 13 years. She joined Armstrong Teasdale in early 2021 when the firms combined. Before that, she worked as a solicitor and trainee solicitor at other firms in London.


  • Queen Mary University of London  (LL.B., 2002)
  • College of Law  (LPC, 2003)


  • England and Wales, 2005

Professional Activities

  • Women in Mining (Member)


  • The Best Lawyers in the United Kingdom®, Corporate Law (2023-present) 
  • The Legal 500, Recommended Lawyer, Projects, Energy and Natural Resources: Oil and Gas, Mining and Minerals and Corporate and M&A (2018-present)


  • Serbian
  • Croatian
  • Bosnian
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