David Tennant has said will quit as Doctor Who at the end of next year. By the time his last shows are screened he will have played the Doctor, to popular and critical acclaim, in the BBC series for four years.

Last night, Tennant, 37, won an award for his popular portrayal of the Time Lord at the National Television Awards. He told the ceremony at the Royal Albert Hall by video link: "I love this show and, if I don't take a deep breath now, I never will and you will be wheeling me out of the Tardis in my bath chair."

Tennant was unable to collect the outstanding drama performance award in person because he is currently starring as Hamlet in a RSC production at Stratford-upon-Avon.

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