FD lost out in the two-way pitch, despite leading Carnival’s successful hostile bid for P&O, approved by shareholders earlier this year.
Brunswick formerly worked for takeover target P&O, brought in to replace Gavin Anderson in 2001 as Royal Caribbean made an approved offer for the group. The agency worked for both P&O and Royal Carribean, until Carnival entered the bidding, prompting Royal to hire The Maitland Consultancy as separate advisers.
P&O shareholders later dropped Royal’s offer in favour of Carnival’s £3.2bn bid.
Brunswick and FD worked on either side of Carnival’s takeover of P&O, overseeing PR surrounding the combined group’s dual listing on the London and New York stock exchanges last month.
Both agencies pitched for the brief following the flotation.
Brunswick partner Richard Jacques leads the Carnival brief, with support from a team of five, including senior associate partner Sophie Fitton.
The agency reports to Carnival’s Miami-based vice-president of PR Tim Gallagher and director of investor relations Beth Roberts.
Brunswick will advise Carnival, traditionally a US- focused firm, on UK issues, helping to build an understanding of, and relationship with, the British media.
Meanwhile, FD parent Cordiant Communications has announced it received takeover approaches earlier this week, following the loss of Allied Domecq’s global advertising business.
Early speculation suggested fellow ad groups Publicis Groupe and WPP were among those to make approaches.