"3. The legal position in this case is very simple. Before an individual is lawfully entitled to work with young children it is a legal requirement that that individual has an existing valid CRB entitlement to work document. 4. It is quite clear from the evidence given by the Claimant that during the relevant time that she claims unlawful deduction of wages, in other words non-payment of wages and non-payment of holiday pay, she did not have the relevant CRB document. Therefore any employment by the respondent of the claimant as a nursery assistant would have been illegal. The employment tribunal is not entitled to enforce illegal contracts and in those circumstances the claimant's claim fails."