In a recent case, it was accepted by the Employment Appeal Tribunal (EAT) that four self employed carpenters were NOT employees but nevertheless were entitled to holiday pay as a result of their terms of engagement.
The EAT stated that the decision was based upon the degree of dependency in their relationship and not the contract between the parties. In light of this decision, we would advice that you should review the basis on which you engage any self employed or freelance individuals or indeed casual labour.