© AFP Daniel LEAL-OLIVAS London (AFP) - London landmark Big Ben will fall silent for four years from Monday as a political revolt rumbles on over renovations that will rob Britain of a cherished symbol at a time of national uncertainty. Westminster's Elizabeth Tower, one of Britain's most popular tourist attractions, is due for conservation work. The famous clock's bells are set to stop ringing at midday over safety concerns, silencing an emblem of continuity as Britain grapples with Brexit negotiations. The decision will protect builders working on the site, amid fears that prolonged exposure to the 118-decibel bongs from the 13.7-tonne Big Ben bell, which chimes out the hour, could damage hearing. But the debate has swiftly moved into the political sphere.