To work as a door supervisor you will need a frontline licence issued by the Security Industry Authority (SIA).
Before you can apply for a licence, you must complete an SIA licence-linked qualification. This is the Level 2 Award for Working as a Door Supervisor in the Private Security Industry.
You will also need an Emergency First Aid at Work qualification, or equivalent. These courses are widely available through local colleges and with organisations like St John Ambulance and the British Red Cross.
Some training providers may combine the first aid course and the Level 2 Award. For others, you may need evidence that you have completed a first aid course before you start your licence-linked training.
You can search for approved training providers that offer courses leading to licence-linked qualifications.