David Mitchell has admitted that his Channel 4 comedy Peep Show is coming to the end of its natural lifespan.

"I'm sad it's coming to an end, but it has to, really, because the premise won't sustain another ten years," he said.

"The notion of two people in their 20s living together is an idea a lot of people can get their heads round. If they continue to do it in their 40s, that doesn't seem plausible.

"So there will be a lump in my throat, but at the same time it seems like a good and dignified way for it to end."

It was recently confirmed that Peep Show will air its ninth and final season in 2015.