It is claimed that three police forces, including the Met Police, may not be able to function properly because of government cuts. HM Inspecorate of Constabulary says around 6,000 officers will be axed from the frontline in England and Wales.
Spending on goods and services will also be cut by about £474 million.
At least 179 police stations will also have closed by 2015, and 264 stations will have lost their front counter, HMIC said.
Sir Denis added that police stations, even those which offered no public access, were often seen as a reassuring sign of control in communities.
These will be replaced by 137 police access points in "shared locations", such as supermarkets, it said.
Sixty Brexiteer politicians, economists and business leaders urged the Prime Minister to reserve the right to walk away without a trade deal
They were steering their way through busy streets just minutes after the world’s last remaining bar on it was lifted.
Since the beginning of 2018 the Metropolitan Police has launched more than 70 murder investigations.