Big Ben had to slow down.
London's iconic clock tower has been running by much as six seconds too fast recently, BBC Radio 4's "PM" show reported.
"We do carry out regular checks, as you can imagine, because this is a mechanical clock. It's not digital, it's not electronic, it does take a lot of love and care," said Steven Jaggs, who is known as "Keeper of the Great Clock."
The clock's maintenance team has had to climb the tower's 344 steps each day to remove or add coins that change the weight of the 156-year-old clock's pendulum.
