Harriet Horswell

Harriet acts for clients in complex, high-value international arbitration and commercial litigation across the energy, infrastructure and technology fields.

• Engagements

  • Advising a sovereign corporation in the renegotiation of a multi-billion dollar commercial contract successfully leading to an outcome valued at over US$2 billion.
  • Acting for a claimant European utility company in a US$200 million New York ICC commercial arbitration under New York law relating to a long-term gas supply agreement.
  • Acting for a respondent Italian utility company in a London ICC gas price review arbitration under English law successfully defeating a multi-million euro price review claim.
  • Acting for a respondent technology company in a multi-million dollar London LCIA arbitration under English law involving issues of contract law and shareholder rights.
  • Acting for an international airline in enforcement and asset preservation proceedings relating to prior arbitral awards.
  • Acting for a Championship football club in disciplinary and arbitral proceedings under the EFL Regulations in relation to proceedings brought by the regulator under the Profitability & Sustainability Rules, involving issues of complex property law and the application of sporting sanctions.
  • Acting for a defendant legal services company in mediation proceedings involving claims for breach of contract under an investment agreement and related misconduct claims.
  • Acting for defendant major UK supermarket group in high profile equal pay proceedings.
  • Acting, as co-counsel, for a respondent Mongolian construction company in Munich SCAI arbitration under Mongolian law involving issues of contract and property law.
  • Acting for defendants in high-profile Commercial Court proceedings brought by one of the world's largest exporters in natural gas in relation to a long-term supply contract and dealing with issues of European Union law.
  • Acting for a Premier League football club in a dispute with a sports intermediary in relation to a claim for breach of contract and quantum meruit, involving issues of contractual interpretation, authority, agency and effective cause and achieving successful settlement.
  • Acting for two defendant international airlines in Court of Appeal proceedings arising out of an adverse decision from the European Commission in the air cargo sector.