He vowed that cutting 4,000 pieces of red tape from Brussels will speed up an economic recovery and "improve people's everyday lives".
The PM promised to finish the huge task by the end of the year despite the efforts of Tory rebels and Labour.
A source said: "Brexit gave us the opportunity to revisit the way we do things and the way we regulate things."
The Downing St source added: "We've already delivered Brexit boons, from freeing up financial services in order to attract investment or deregulating to bring new business to our shores.
"Now we've got to double down on that work. There are so many things we can do and so many areas to improve how we do things.
"It's about harnessing those ideas into delivery to cut red tape for businesses and reduce costs for families." Mr Sunak discussed the plans which fall under the Retained EU Law (Revocation and Reform) Bill with members of the Cabinet yesterday.
The Bill returns to the Commons today with ministers also considering proposals on possible post Brexit regulatory changes in creative, medical and farming sectors.
The PM said the work has the "potential to drive growth and improve people's everyday lives".
Mr Sunak added: "Developing the best regulatory environment in the UK will be crucial to accelerating our economic recovery and driving growth, innovation and competitiveness as part of plans to build a better future.
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Denne historien er fra January 18, 2023-utgaven av Daily Express.
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Blues make Marc as Guiu hits the jackpot
HAT-TRICK HERO IS QUICK TO SHATTER IRISH HOPES
Lane needs more rain
KEMPTON GROUND FEARS FOR JP'S TEAM
Festive-flavoured vapes slammed by top NHS doctor
Spike in admissions among young users
Profs win battle over smokers' wall
TWO Oxford dons have won a six-figure row with a hotel next door over a collapsed garden wall and its staff \"smoking and chatting\" too close to their home.
PoW life's such a drag for officer in panto
THE war diaries of a British PoW who became an unlikely star attraction in camp as a panto dame have come to light 79 years on.
There's NUN so good at crime fighting!
Ahead of its Christmas special, JAMES RAMPTON visits the picturesque Cotswolds set of Sister Boniface Mysteries (at the height of summer) to discover just why the Sixties-set cosy crime drama has captivated audiences all over the world
Puffin pic secures prize for teenage twitcher Anwen
THIS picture of a plaintive puffin has been picked for the top prize in the RSPCA Young Photographer Awards.
'Blast' prank by soldier ‘reckless'
A SOLDIER left colleagues with hearing loss after \"recklessly\" setting off a battle noise simulator to celebrate the end of an exercise, a court martial heard.
Vegetarian piranha and DiCaprio snake among new species
AVEGETARIAN piranha from the Amazon and a flying dinosaur found on the Isle of Skye are among the species previously unknown to science that have been named this year.
Anger over takeover of Titanic shipbuilder
Critics fear final assembly will move from Belfast to Spain
