This book chapter forms the basis of an expert UK county report submitted to the European Federation of Building and Woodworkers as part of a 12 country EU project. The project itself was dedicated to an analysis of the theory and practice of the functioning of the Posting of Workers Directive. The key focus was on the practical experiences of compliance authorities, labour inspectors and other controlling bodies. With one of the main conclusions of the project being that the use of the posting mechanism ranges from normal and decent long-established partnership between contracting partners to completely fake letter box practices of labour-only recruitment