It was only a little letter from a small office in Brussels, but it has sent a big shockwave through the industry that could revolutionise the way retail groups do business with their major suppliers.The sender, Eurelec Trading Scrl, opened for business in June as a cooperative joint-venture between Rewe und Leclerc. Its function as a European buying office is to obtain the best possible terms & conditions for these German viz. French retail giants.Logically, Eurelec has started its annual negotiations for 2017 with the big boys. We understand that there were originally six international brand manufacturers involved, but now only four: Mars, Mondelez, PepsiCo and SCA. Apparently, they have been asked to come to a decision by the end of this month, and it is generally believed that they will accept.Eurelec seems to have detailed knowledge of the terms & conditions these suppliers accord retailers on both sides of the Rhine. So has there been collusion between Rewe and Leclerc in contravention of EU cartel law?