Boris Johnson has unveiled plans for a light show in Downing Street on Brexit night.
This comes as he has attempted to defuse a row over his failure to get Big Ben to sound that evening.
The Prime Minister will address the nation from inside No 10 as a clock counting down to the moment Britain leaves the EU at 11pm on January 31 is projected on to the outside.
Buildings around Whitehall will be lit up and Union Jacks will be flown in Parliament Square.
Leading Tory Eurosceptics dismissed the plan as an inadequate substitute for the Big Ben bell being heard.
No 10 was also forced to defend its decision to stage the countdown in Downing Street, which is not accessible to members of the public.
However, aides insisted that the public will be able to watch it on television and on social media sites such as Facebook.
As part of the official plans to mark the country’s departure from the EU, the commemorative Brexit coin will come into circulation on January 31.
The Prime Minister is expected to be one of the first to receive a newly minted 50p piece.