The founder of a website that allows the public to post comments on doctors has insisted he has safeguards to prevent publication of defamatory allegations.

Neil Bacon, who launched iwantgreatcare.org this week, said he was confident the website's systems would prevent individual doctors being libelled. His comments followed a letter sent by lawyers Carter Ruck on behalf of 37 doctors expressing their "grave concerns about the potential for inaccurate, irresponsible and defamatory allegations being published".

The letter concluded: "We put you on formal notice that if one of our clients is defamed on your website and instructs us to take action, a copy of this letter will be made available to the court."

Dr Bacon said some trusts intended to use the service to monitor patients' views. In light of the emphasis on patient experience in the Darzi report, he anticipated some of these arrangements would be formalised.