Middlesbrough F.C. with supporters' clubs across the globe. The largest supporters' clubs include the Official Supporters' Club, the Middlesbrough Disabled Supporters' Association, Yarm Reds, Red Faction and Middlesbrough Supporters South. Middlesbrough supporters' main rivals are Sunderland (with whom they contest the Tees–Wear derby), Newcastle United (with whom they contest the Tyne–Tees derby), and Leeds United, a fact confirmed by planetfootball.com's 2004 survey. Carlisle United see Middlesbrough as their biggest rivals, but Middlesbrough supporters have not reciprocated, as they do not see Carlisle as a top three rival. The nickname "Smoggies" was first used as a derogatory term by opposing supporters; it relates
Middlesbrough F.C. to the industrial air pollution – smog – that used to hang over the town, but it was later used by Middlesbrough fans in a somewhat self-deprecating manner before finally being adopted as a badge of pride by supporters of the club. An example of this can be seen on the banners carried to away games stating "Smoggies on Tour". Middlesbrough fans were notably praised by UEFA Chief Executive Lars-Christer Olsson after their behaviour during the 2005–06 UEFA Cup campaign. He commended that: Middlesbrough fans had also been praised by Cleveland Police for their behaviour in previous rounds, particularly in