The lists of documents are based on those prescribed to show evidence of a right to work.

List A

Document
A passport showing the holder, or a person named in the passport as the child of the holder, is a British citizen or a citizen of the UK and Colonies having the right of abode in the UK.
A passport or national identity card showing the holder, or a person named in the passport as the child of the holder, is a national of a European Economic Area country or Switzerland.
A Registration Certificate or Document Certifying Permanent Residence issued by the Home Office to a national of a European Economic Area country or Switzerland.
A Permanent Residence Card issued by the Home Office to the family member of a national a European Economic Area country or Switzerland.
current Biometric Immigration Document (Biometric Residence Permit) issued by the Home Office to the holder indicating that the person named is allowed to stay indefinitely in the UK, or has no time limit on their stay in the UK.
current passport endorsed to show that the holder is exempt from immigration control, is allowed to stay indefinitely in the UK, has the right of abode in the UK, or has no time limit on their stay in the UK.
current Immigration Status Document issued by the Home Office to the holder with an endorsement indicating that the named person is allowed to stay indefinitely in the UK or has no time limit on their stay in the UK, together with an official document giving the person's permanent National Insurance number and their name issued by a Government agency or a previous employer. 
full birth or adoption certificate issued in the UK which includes the name(s) of at least 1 of the holder's parents or adoptive parents, together with an official document giving the person's permanent National Insurance number and their name issued by a Government agency or a previous employer.
A birth or adoption certificate issued in the Channel Islands, the Isle of Man or Ireland, together with an official document giving the person's permanent National Insurance number and their name issued by a Government agency or a previous employer.
A certificate of registration or naturalisation as a British citizen, together with an official document giving the person's permanent National Insurance number and their name issued by a Government agency or a previous employer.

List B

Document
current passport endorsed to show that the holder is allowed to stay in the UK and is currently allowed to do the type of work in question.
current Biometric Immigration Document (Biometric Residence Permit) issued by the Home Office to the holder which indicates that the named person can currently stay in the UK and is allowed to do the work in question.
current Residence Card (including an Accession Residence Card or a Derivative Residence Card) issued by the Home Office to a non-European Economic Area national who is a family member of a national of a European Economic Area country or Switzerland or who has a derivative right of residence.
A current Immigration Status Document containing a photograph issued by the Home Office to the holder with a valid endorsement indicating that the named person may stay in the UK, and is allowed to do the type of work in question, together with an official document giving the person's permanent National Insurance number and their name issued by a Government agency or a previous employer.
A Certificate of Application issued by the Home Office under regulation 17(3) or 18A (2) of the Immigration (European Economic Area) Regulations 2006, to a family member of a national of a European Economic Area country or Switzerland stating that the holder is permitted to take employment which is less than 6 months old, together with Verification from the Home Office Evidence and Enquiry Unit. The licence may be granted for six months from the date of the Certificate of Application.
Verification issued by the Home Office Evidence and Enquiry Unit to you, which indicates that the named person may stay in the UK because they have an in time application, appeal or administrative review and which is outstanding. The licence may be issued for six months from the date of the licence decision.