Britain left the European Union at 11pm on Friday. Thousands gathered in Parliament Square to celebrate the event.
The Prime Minister was joined by ministers and Downing Street staff to mark the occasion.
However according to MailOnline the countdown had to take place manually after the TV feed was lost.
The paper reports Mr Johnson gave a speech to the assembled politicians and officials.
He is quoted as saying: “This is a fantastic moment in the life of our country.
“This is a fantastic moment in the life of our country" (Image: GETTY)
Brexiteers gathered to celebrate Britain's EU exit on Friday (Image: GETTY)
“There are very few moments in our lives that really can be called an historic turning point, and this is it.
“This is not the end, as some people would say.
“It's not even the beginning of the end.
“It's not the half of the middle.
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Brexit supporters celebrate in Parliament Square (Image: GETTY)
“This is the end of the beginning.
“This is the start of something fantastic and different.