This week, the European mergers and acquisitions bosses at four investment banks have decided to celebrate a bumper 12 months of dealmaking by planning staff parties. Each M&A chief has selected a different London venue for the bash and chosen a different movie-based fancy-dress theme. They have also invented their own party cocktail to welcome the guests. Which of the M&A bosses has created the Long Island Iced Takeover cocktail? CLUES BELOW

CLUES