Clifford Chance and Freshfields Bruckhaus Deringer won the lead roles on BAA’s £13.3bn refinancing.
Freshfields represented BAA after also advising its owner Ferrovial when it took the airport operator private in 2006.
The team was led by London finance partners Marcus Mackenzie and Ian Falconer.
Clifford Chance advised the lead arranging banks on a series of complex debt restructurings, bond arrangements and loans.
Other firms on the deal included Latham & Watkins for liquidity facility provider Lloyds TSB, CMS Cameron McKenna for the BAA pension fund trustee and Linklaters for BAA’s existing bonds trustee.