Premier Groundworks Ltd v Jozsa - right to delegate meant an individual was not a "worker" for WTR purposes

The judge in this case (Silber J) has provided such a succinct but comprehensive summary that we cannot improve on it and set it out almost verbatim below:

Mr Jozsa entered into a written agreement dated 1 January 2006 with Premier Groundworks Ltd to provide groundwork services.The agreement provided that:-