On 24 March 2015 the ground was officially renamed "The Prostate Cancer UK Stadium" for one day, for the game against Wycombe Wanderers, in support of charity and raising awareness of prostate cancer. In 1985, following the lead of Queen Park Rangers' experiment at Loftus Road four years earlier, the grass pitch was dug up and replaced with an artificial playing surface. The surface, called Sporturf Professional, was manufactured by En-Tout-Cas, and cost the club £350,000. The first match on the new pitch resulted in a 1–1 draw with Nottingham Forest. The new surface became exceedingly unpopular, and was derided as "the plastic pitch". Protests about the pitch from other teams resulted in a meeting with a number of major clubs in 1989, mediated by a Football League Commission. The Commission concluded that the pitch had suffered excessive wear and tear from too much use, and Luton installed a new surface, at a cost of £60,000, during the summer of 1989. The second artificial pitch was removed during the summer of 1991, following the banning of such surfaces from English football. On 13 March 1985, Millwall visited Kenilworth Road for an FA Cup sixth round match. After only 14 minutes the match was halted as the visiting fans began to riot. The referee took both teams off for 25 minutes, before bringing them back on to complete the match. Following the final whistle, and a 1–0 victory for Luton, another pitch invasion and subsequent riot by away supporters caused noticeable damage to the ground and the surrounding area. Many of those arrested turned out to be supporters of teams other than Millwall. The club's chairman, David Evans, reacted by imposing a ban on all away supporters from Kenilworth Road from the start of the 1986–87 season as well as introducing a scheme that would require even home supporters to carry membership cards to be admitted to matches. The Football League insisted that Luton relax the ban for League Cup matches, but when Evans refused to allow Cardiff City fans to visit Kenilworth Road for their second round tie, the club were thrown out of the competition. The ban continued for four seasons, with exceptions for cup matches, before Luton Town repealed the ban before the 1990–91 season. The ground was first constructed in 1905, soon before the club moved in. The club rented the ground until 1933, when newly appointed chairman Charles Jeyes organised the purchase of the stadium. The club retained ownership of the ground until February 1989, when the freehold was sold to Luton Borough Council for £3.25 million.