List A and List B documents are two lists of documents which can be accepted as proof of right to work. Whether an employee falls under List A or List B depends on their nationality and/or their current immigration status in the UK.
EU, EEA, and Swiss nationals and their family members who were living in the UK before the end of the Brexit transition (31 December 2020) have until 30 June 2021 to apply for Pre-Settled or Settled Status under the EU Settlement Scheme.
As they have until June 2021 to apply Europeans can still simply present their passport to evidence their right to work in the UK, as the right to work rules will not change until 1 July 2021.
European nationals coming to the UK for the first time from 1 January 2021 onwards will need to enter under the correct UK visa route.
For more information on Brexit and the rights of those already, and arriving, in the UK please see our BREXIT information page.