But once eligibility has been confirmed, how do people apply for a free bus pass?
There are once again differences depending on where a person lives.
In Scotland, to apply for a free bus pass, people should contact their local authority or the Strathclyde Partnership for Transport for details of the application process.
The local authority will then tell people if they need to complete an application form to secure their pass.
In Northern Ireland, eligible people can pick up an application form in person at a bus or rail station, or by phoning or emailing the designated free bus pass contacts, available online.