Professor Robert Winston has spoken of how his father died aged 42 after a series of innovative medical treatments to cure what began as a minor infection.

The Labour peer said he knew something of the tragedy of seeing somebody destroyed in front of you after his "wonderful, amazing, chess playing" father Laurence Winston died while he was a child.

Lord Winston said an initial innovative treatment for a minor infection was "quite inadequate" before another innovative procedure led to the development of an abscess.

He explained his father died within six months of an innovative operation that was not evidence-based, leaving his mother Ruth "desperate, destitute financially".

Lord Winston said he had endured a sleepless night before speaking against Lord Saatchi's Medical Innovation Bill, warning he was concerned the proposals would allow irresponsible innovation.

He also said he took "strong objection" to Labour saying it is the only party wanting to support and protect the NHS, telling peers: "That's nonsense."

Lord Saatchi's Bill aims to give legal protection to doctors who try out different procedures or treatments when they have exhausted other options.

The Tory peer has been campaigning for law changes to enable more innovation in treatment since his wife, novelist Josephine Hart, died from a form of ovarian cancer in 2011.

Lord Winston moved an amendment to prevent the Bill applying where responsible medical opinion considers the innovate treatment under consideration as likely to seriously or unreasonably comprise patient safety.

He told peers: "When I was not yet nine, my wonderful, amazing, chess playing, music instrument playing, polymath father died.

"He'd had a minor infection which was treated by an innovative antibiotic treatment, which was quite inadequate."

During debate on the amendment, Lord Saatchi said: "We do share the experience of witnessing a terrible event and even though that is the case I know you will share with me the view that while we share that experience in common, it hasn't led to an agreement between the two of us about the merit of this Bill."

Lord Winston said he would withdraw his amendments after further meetings were promised before the Bill reaches third reading in the new year.