All employers in the UK have a responsibility as laid out in the Asylum and Immigration Act 2006 to prevent illegal working. In order to meet this responsibility employers are legally obliged to check the entitlement of anyone they plan to invite to undertake work. All workers (including UK nationals) are required to provide evidence that they are legally able to work in the UK.
If you accept your offer, we will need to conduct a Right to Work (RTW) check, otherwise called 'eligibility to work in the UK'. Checks of UK and Irish passports now need to be conducted face to face as the Government has withdrawn the option to conduct these online.
Find information on proving right to work and home office guidance