Allen & Overy and Linklaters are understood to have won advisory roles on the three-way battle for control of Europe's largest breweries.

London brewing giant SABMiller this week saw its takeover offer for rival Heineken rejected, with the Dutch company calling the approach "non-actionable" and insisting it wanted to maintain its independence.

Reports meanwhile suggest that SABMiller launched the takeover bid in order to safeguard itself against an approach from Anheuser-Busch (AB) InBev, the world's largest brewer.

AB InBev is thought to be searching for bank finance to fund a takeover of SABMiller, with a deal potentially worth up to £75bn.

Legal Week understands that A&O is advising Heineken, after the magic circle firm took a role for SABMiller when the brewer launched a successful AU$11.5 billion (£7.8 billion) takeover of Fosters three years ago.

Linklaters is thought to be advising SABMiller. The magic circle firm represented the brewer as recently as July on the sale of its stake in South African hotel and casino operator Tsogo Sun Holdings, valued at 11.7bn rand (£660m).

Hogan Lovells appears to have missed out on a mandate in what will come as a blow to the firm, which has counted SABMiller as a key client for a number of years.

post-merger strategy review following the combination of legacy firms Lovells and Hogan & Hartson in 2010 placed SABMiller in the top tier of Hogan Lovells' new three-tier client programme, alongside its other closest relationship partners such as Ford.

Hogan Lovells went on to advise SABMiller on its takeover of Fosters in 2011, subsequently acting on a $7bn (£4.3bn) bond financing in January the next year to repay a substantial part of the debt incurred.

London corporate partner Andrew Pearson took over the running of Lovells' relationship with the brewer when former legacy Lovells partner John Davidson was made SABMiller general counsel in 2006, having previously advised on SABMiller's $7.8bn (£4.8bn) acquisition of Grupo Empresarial Bavaria in 2005, as well as on a joint venture with Molson Coors Brewing Company two years later.

A Hogan Lovells spokesperson said that the firm continues to have a strong relationship with SABMiller and continues to work closely with them.

Sullivan & Cromwell is regularly mandated on M&A work for AB InBev, though neither the firm nor client responded to requests for comment on recent deal activity.