[00:00.00] It's one of the must-see attractions for visitors to London. Most tourists only get to look at the outside of the famous clock tower. But for a few thousand people a year who organise a tour of it, this is how it sounds on the inside. The clanking of the old machinery which operates the clock and those bongs. It can only be visited if it's arranged in advance by contacting a member of Parliament, usually only done by the small number of UK residents who are aware of it. But rather than those tours being free in future, there'll be a charge of ￡15 per person. House of Commons officials say it will simply cover the ￡111,000 a year it costs to provide the tours. But a group of disgruntled MPs argue that UK residents already pay through their taxes. They say Big Ben is a world-renowned symbol of British democracy, and visiting it should be free.