You can apply for a national insurance number using the link below
https://www.apply-national-insurance-number.service.gov.uk/work
If you have made an application for a national insurance number and are waiting for a response, you may complete your onboarding by entering a ‘temporary number’ in the format below
AA112233B
As soon as you receive your national insurance number, please e mail the details along with your full name to accounts@wearearc.co.uk