DOWNTON Abbey creator Julian Fellowes has revealed he found it "testing" to write Dan Stevens' character out of the series after the actor announced he was leaving.

Viewers saw Matthew Crawley killed off in the Christmas special, just after he and wife Lady Mary had welcomed their first child.

Fellowes admitted that after Matthew and Mary's long love affair, the only way to write him out was to kill him off. But as Jessica Brown Findlay's character Lady Sybil had been killed off a few episodes earlier, they did not want to dwell on the death. He said: "We knew Jessica was leaving from quite a long time before, and so we completely decided calmly to kill her off in the fifth episode, so that would give people three episodes to recover, and then we'd have the Christmas special and everyone could move forward.

"But having done that, when the news came through that Dan was also leaving we couldn't very well do it again, so that was a bit testing."

Stevens revealed he was leaving just as series three started filming, and Fellowes admitted at first he did not know how they were going to write him out.

But executive producer Gareth Neame said: "The only way we could break Mary and Matthew apart was for one to die. There really was no alternative."

Fellowes said: "We couldn't have three years of them being in love and suddenly him taking against her and nipping off to Japan. That wasn't a workable scenario."