“2.2 I am a UK National who first came to the UK in 1996. After a short break in India, I came back to the UK again in 2003 and have lived here as a permanent resident and UK national. Prior to Pentecost, and following the finishing of my studies, I have worked professionally as an actor in a feature film (The DiVicenczo Cose), a few short films (Music Land World, How to Date..., Moving ON), in an episode of the TV show Fake Britain), commercials (118,) and a music video. I was working for a very few days on another project at the same [time] as Pentecost rehearsals. This was for the production, ‘BaBa Shakespeare’, but my part in the project came to an end very soon within a few days. I was paying my own tax and National Insurance.” 25. This description is strongly suggestive of a person who has embarked on a profession or business undertaking. She appears to be actively marketing her services as an independent person to the world in general rather than being recruited to work for any individual as an integral part of that individual’s operations. She was, no doubt, immersed in the Respondent’s play once she had been cast in it; but she was not integrated into the Respondent’s theatre production business. 26. The Employment Judge made no findings about the way in which the Claimants carried on their work as actors. He does not appear to have recognised that there was a potential issue in this respect. In my opinion there clearly was. It is no doubt true that some of the Claimants were just starting out on what they hoped would be acting careers. The question, however, still arises: upon what were they embarking? Was it a profession or business undertaking (or both); if they were actively marketing their services as an independent person to the world in general, picking up or attempting to pick up work where available from a variety of sources, this may be a powerful indication that they were not “workers”. 27. In my experience Employment Judges generally provide a statement of applicable principles by reference to relevant legislation and case-law rather than a textbook. This is a good discipline. It is usually the legislation and the leading cases which identify with most precision the legal principles which must be applied. Textbooks tend to be more discursive. Sometimes (as in Chief Constable of Lincolnshire Police v CastonUKEAT/0530/08 ) the textbook takes very much a line of its own. In this case the Employment Judge understandably chose a textbook which was particular to the kind of case he was considering – a national minimum wage case. However the textbook did not purport to be an exhaustive treatment of the question of “worker”: it specifically cross-referenced, for a more detailed treatment, to another textbook in the same series. In the result, the Employment Judge did not identify the statement of principle by Langstaff J in Cotswold . I think he missed the potential significance of the point. That he did so is also clear from his partial citation of the definition, omitting reference to “profession or business undertaking carried on by the individual” (an omission, I should make clear, which cannot be laid at the IDS handbook). 28. I have asked myself why it seemed so obvious to the Employment Judge that the Respondent was not a “client or customer”