Source: United Kingdom UK Parliament (video statements)
From 6pm on Saturday 26th October, Big Ben will be undergoing scheduled maintenance. That means the chimes will be silenced and the clock will temporarily be incorrect.
This is an important time our Clock Mechanics will use to test the clock mechanism and make sure everything is in top condition. It’s crucial that those illuminated faces shine through the cosy autumn evenings to come.
You can expect the chimes to begin ringing out again at 2am on Sunday 27th October, marking the start of British Winter Time.