Holman Fenwick & Willan has acted on a $1.3bn (£648m) energy deal for Indonesian-listed Bumi Resources, which has sold a stake in two mining companies to India's largest privately-owned utility company, Tata Power.

The firm's Singapore, London and Dubai offices acted on a deal in which Bumi sold a 30% stake in Kaltim Prima Coal and Arutmin Indonesia to Tata. It is one of Southeast Asia's largest M&A deals in the mining sector to date.

Former White & Case partner Alistair Duffield, who joined Holman Fenwick in 2003, led the deal from Singapore. In London, corporate and commercial partners Nick Hutton and Samantha Roberts led the team while energy partner Daniel Chung, also formerly a White & Case partner, advised from Dubai.

Holman Fenwick was assisted on local law issues by capital markets partner Rambun Tjajo from Baker & McKenzie's local arm in Jakarta, Hadiputranto Hadinoto & Partners.

Australian firm Freehills advised Tata Power. Energy and resources partner Haydn Dare led the team. Mining partner Dezi Kirana at Indonesian correspondent firm Soemadipradja & Taher provided local law advice.

Duffield has worked with the Bakrie family – which runs Bumi – since the mid-1990s, and first advised Bumi at Holman Fenwick in 2003 on its $500m (£249m) acquisition of Kaltim Prima Coal.

Duffield said: "The firm has teams in Singapore, Hong Kong, Melbourne and London with specific, in-depth expertise in the coal industry. This transaction demonstrates the value of our investment in building this expertise and our ability to execute major complex transactions in the sector."