Baker McKenzie and Slaughter and May are advising on UK pharma giant GlaxoSmithKline's (GSK) acquisition of Horlicks from Unilever, in a deal worth $3.8bn (£3.1bn).

Unilever is acquiring the Horlicks brand as part of its purchase of GSK's health food drinks portfolio in India, Bangladesh and 20 other mainly Asian markets.

Baker McKenzie is advising longstanding client Unilever on the deal, with a City team led by London corporate partner David Scott alongside technology partner Steve Holmes, intellectual property partners Sue McLean and Michelle Blunt, and tax partner Alistair Craig.

It is working in conjunction with Mumbai-headquarted firm Cyril Amarchand Mangaldas, which is advising Unilever on Indian law aspects of the deal.

Slaughters is advising longstanding client GSK, alongside Indian corporate law firm AZB Partners, which is advising on matters of Indian law.

The Slaughters team is being headed up by corporate partner David Johnson and includes corporate partners Simon Nicholls and Christian Boney, intellectual property partner Susie Middlemiss, commercial partner Duncan Blaikie, tax partner Dominic Robertson, employment partner Sandy Maudgil and competition partner Bertrand Louveaux.

Earlier this year, Slaughters led for the pharmaceutical giant on its $13bn (£9bn) purchase of a 36.5% stake in its consumer health joint venture with rival Novartis.

Bakers has previously advised Unilever on a number of acquisitions, including the purchase of Latin American company Quala's home and personal care businesses last year. Scott led the firm's team that advised on that transaction. In 2015, the international firm advised on Unilever's acquisition of British cosmetics brand REN Skincare.

Bakers recently won a place on Unilever's global legal panel, alongside several firms including Mayer Brown, DLA Piper and CMS.