Ray Gosling, a veteran documentary-maker, said he had smothered the man with a pillow as he lay in his hospital bed, after doctors said they couldn’t help relieve his suffering.

He claimed he had previously made a pact with the man, whom he did not name, that he would help him die if his pain became unbearable.

Mr Gosling insisted that he had no regrets about his “startling confession”.

He made the admission during a film in which he looked ahead to his own death and funeral for BBC East Midlands’ Inside Out show, broadcast on Monday evening.

It is likely to lead to fresh claims that the BBC is “biased” in support of relaxing the law on assisted suicide, ahead of the publication of new official guidelines.

Mr Gosling said: “I killed someone, once. He was a young chap, he’d been my lover and he got Aids.

“In a hospital one hot afternoon, the doctor said there’s nothing we can do. He was in terrible, terrible pain.

“I said to the doctor ‘leave me just for a bit’, and he went away, and I picked up the pillow and smothered him till he was dead.

“Doctor came back and I said ‘he’s gone’. Nothing more was ever said.”

Questioned by a co-presenter about why he had now made his confession, apparently years later, Mr Gosling said he had met a lot of people in similar situations to his, whose loved ones were in “terrible pain” but were “taking a long time to die”.

Asked if he had any regrets, he replied: “None whatsoever. I did the right thing.

“We’d got a pact. We’d got an agreement, if it got worse, the pain, and nobody could do anything, I said I’d do it.”

Mr Gosling said only some of the dead man’s family knew what had happened.

Complete Story at UK Telegraph