Ineos Inovyn has agreed to acquire the remaining 50pc stake in Runcorn MCP, including the EDC assets of Vynova Runcorn, which entered administration in late 2025.
The deal will return the site to full Ineos ownership, subject to regulatory approval. Runcorn MCP accounts for 89pc of UK chlorine capacity and has chlorine production capacity of 430,000 t/yr, underlining its importance to the country's chlor-alkali and downstream chemicals industries.
The site is currently operated as a 50:50 joint venture between Ineos Inovyn and PVC producer Vynova.
EDC is the largest outlet for chlorine production at Runcorn. Volumes were previously exported mainly to Wilhelmshaven in Germany and Martorell in Spain for PVC production.

