then inspect the site that the rubbish has been dumped at, identifying it as their rubbish by the substance they marked it with. In all cases, once enough evidence of a trader's practices, ethics, and other misdemeanors are acquired via hidden cameras, Allwright will make arrangements to interview the trader and question them on what they do, and why they behave in a way that can leave customers cheated, unhappy, and shocked. In some cases, if the trader had appeared in an earlier episode for similar behaviour, the host will also question them on why they are still trading in the same manner as before. How the host arranges the interview, is done in one of two ways – for DIY traders, Allwright will usually set up a sting, in which the trader is called out to deal with a job, only to be ambushed by the host, who during the fourth and fifth series, wore a disguise and did not break character until after a suitable amount of time passed. For most others, Allwright will usually visit the place they work from and attempt to interview them there. In most cases, the trader(s) will avoid answering questions, sometimes swearing, locking themselves away in a place they cannot be reached by the host, or trying to give vague, unrelated answers while walking/driving away. In some cases, Allwright manages to interview them before they leave or he and his camera crew are asked to leave. In rare cases, traders may aggressively force the host and his camera team to leave, even intimidating them with the support of close friends. An episode then ends with Allwright warning customers about trading with the rogue trader, whereupon he narrates a response to viewers, made by the trader in relation to the show's investigations and the allegations of their practices, actions and attitude to customers. For some episodes, usually the last in the series, the show looks back at some of the traders they featured and reveals what happened to them after the episode they featured in had ended. In these episodes, footage from a trader's episode is used to remind viewers of how they performed and the opinions of their customers who complained about them and the experts who observed their work practices. New footage is then shown of what occurred afterwards with the trader, which include interviews with customers who had dealings with