Allen & Overy (A&O) and Garrigues have won the lead roles on the €11.5bn (£7.85bn) approach by Imperial Tobacco for Spanish rival Altadis, announced earlier today (15 March).

A&O is advising Imperial, the fourth-largest tobacco company in the world, with City-based corporate partner Jeremy Parr – who handles the magic circle firm's relationship with the client – leading the team.

Fellow London corporate partner Helen Harrison-Hall is also advising Imperial, alongside local finance head Inigo Gomez-Jordana and M&A partner Juan Barona in Madrid.