Pub groups Unique and Voyager, part of Guy Hands' Terra Firma Capital Partners outfit, have been trying without success to fill two top vacancies since October. Unique's chief executive, Giles Thorley, defected from the 3,260-strong chain to take on the challenge of floating rival Punch Pub Company on the stock market. Just a week later, it emerged that John Denning, chief executive of Voyager, had also quit.