http://www.radioeins.de/programm/sendungen/medienmagazin/radio_news/radionews_2011_07_17.html claims, that the decomissioning of Kløfta radio station in January 1995 was the fastest decomissioning of a broadcasting station ever done in peace time in Europe.
It was shut-down on January 2nd, 1995 and it took just a few days before the towers were demolished and the devices scrapped. Who knows more?