Door supervisors only need one licence to work anywhere in England and Wales. This is called an SIA license.
It is against the law to work as a door supervisor without an SIA licence.
How to get an SIA licence
The Government set up the Security Industry Authority (SIA), who now manage the licensing of the private security industry.
You can find out how to apply for an SIA licence on GOV.UK.
Anyone wishing to apply for a licence will need to undergo a criminal records check. The SIA will only grant licences to people who have the right skills and training to do the job.