Allen & Overy (A&O) and Mayer Brown have taken lead roles on Baja Mining’s $823m (£518m) financing facility for the construction and development of its flagship Mexican mining project.

Mayer Brown advised the lending group on the project financing, which is one of the largest of this nature to come to market. The completion of the deal means that full-scale construction activities on the Boleo mining project can commence imminently.