The title nurse can be used by anyone in the UK. They can use this term to offer professional advice and services even if they have no professional qualification, experience or have been struck off a professional register.
To protect the public, the title should be restricted to those who are registered with professional regulators such as Registered Nurses and Dental Nurses. This would be the same as titles such as paramedic, physiotherapist and hearing aid dispenser which are limited to those on the professional registers.
Anyone can sign the petition as long as they are a British citizen or UK resident.
https://petition.parliament.uk/petitions/587939
You may like to read a short article by Professor Leary published in September 2021 explaining the present situation and risks.
https://richmondgroupofcharities.org.uk/news
Also the Royal College of Nursing press release June 2021 re the growing practice of employing those without registered nurse qualifications into registered nursing roles.
https://www.rcn.org.uk/news-and-events/press-releases/nursing-workforce-crisis-leads-to-risky-recruitment-practice