Sherlock co-creator Steven Moffat has revealed he does feel a bit guilty about making fans wait so long for new episodes of the popular show.

The 53-year-old writer and producer, who co-writes the show with Mark Gatiss, said: “The appetite for Sherlock is wonderful.

“I feel slightly guilty that we may have exacerbated the appetite through starvation because we make so few of them over so much time. But it’s incredibly rewarding that each time we come back it’s so rapturously received.”

He added: “It makes it last longer, that’s for sure. If we’d done it at the normal rate, which would be six to 12 every year or every two years, we’d be finished by now and we’d never get hold of Benedict and Martin again.

“So it’s certainly kept it going, and it’s nice that we don’t wear it all out. It’s still quite fresh even though it’s a few years old now.”