You're both right: for >=20 redundancies, it is merely something the employee can take up at tribunal. For >=100 redundancies, notice to the Secretary of State

You're both right: for >=20 redundancies, it is merely something the employee can take up at tribunal. For >=100 redundancies, notice to the Secretary of State is required and not giving notice is a criminal offence, by both the company, and also any officer/director/similar who is involved in not giving notice: https://www.legislation.gov.uk/ukpga/1992/52/section/194 https://www.legislation.gov.uk/ukpga/1992/52/section/194 A level five fine on the standard scale is (since 2015) technically unlimited, so it's not a toothless law. Not sure if anyone has even been prosecuted though.