You'll need to apply for a Close Protection licence issued by the Security Industry Authority (SIA) to work as a bodyguard.
To apply, you must first complete the Level 3 Certificate for Working as a Close Protection Operative course, which is done through an SIA-approved training provider . You will also need a close protection first aid qualification .
Once you have your licence, you can apply to an organisation directly to work as a bodyguard or go through a recruitment agency specialising in security and close protection work.
Experience in the police, armed forces or prison service could be useful.