Protocol of an interdisciplinary consensus project aiming to develop an AGREE II extension for guidelines in surgery.

Funding bodies will not be involved in the development of the instrument. Research ethics committee and Health Research Authority approval was waived, since this is a professional staff study only and no duty of care lies with the National Health Service to any of the participants. Conflicts of interest, if any, will be addressed by reassigning functions or replacing participants with relevant conflicts. The results will be disseminated through publication in peer reviewed journals, the funders' websites, social media and direct contact with guideline development organisations and peer-reviewed journals that publish guidelines.