"Been a wild few weeks and mental 10years with the most amazing cast & crews. None more so than the 3 below who I'd be lost without," he wrote. "A job of a lifetime only made possible by the fans tuning in series after series, for that I can't thank you all enough."
As for the future of the show, after the incredibly high ratings of the season six finale, the BBC's Chief Content Officer Charlotte Moore said in a statement: "I'm looking forward to having a conversation with the team about where we go next and what the future of the series might be."