FILE - In this Thursday, April 30, 2009 file photo, the Big Ben bell is seen inside St. Stephens tower at the Houses of Parliament, in central London. Officials on Tuesday, Aug. 25, 2015 said that the famous clock at Britain's Parliament, used by people across Britain to check the time, has recently been slow by as much as six seconds. (AP Photo/Lefteris Pitarakis, File)