Passport, Driving Licence or Birth Certificate.
Pre employment checks are an essential part of the recruitment process. Helping to reduce the risk of hiring the wrong person and confirming that the candidate meets the job preconditions from the job vacancy advertisement.
The job offer process would have laid out what pre-employment checks would be required for the position.
Little extra reassurance that you're hiring the right person for the job
Confirm right to work in the UK. Certificate of registration, Residence Permit, or immigration documents.
Disclosure and Barring Service (DBS) – Standard, Enhanced, or Enhanced with list checks.
Unspent cautions and convictions.