On that I completely agree. Theresa May has been terrible for that, absolutely terrible.
Yes except the government has already said and agreed in principle with the EU that there will be a standstill transition until 31 Dec 2019. The new regulations will come into force in nearly two years time. Laws can and frequently do change with shorter notice than 2 years.
We can't say what the new regulations are until an agreement is made with the EU as to what they will be.
One regulation that has just changed affecting small businesses of every size and shape is the introduction last month of the GDPR. I would estimate more than 90% of small businesses would have spent less than 1.5 years planning for GDPR.
The Health Act 2006 transformed pubs in this country by outlawing smoking in them. The ban came into effect with less than 12 months after the Act was signed onto the statue book.