Analysts, however, said they expected it would take time for the tariffs to work their way into the data.
It said immigration enforcement officials had "intensified" their work to "tackle those abusing the UK immigration system and exploiting vulnerable people".Officers had visited more than 9,000 businesses - among them restaurants, nail bars and construction sites - to check paperwork and working conditions.
Such businesses had often subjected migrants to "squalid conditions and illegal working hours" as well as below-minimum wages.The Home Office said there were a range of industries exploiting migrant workers.In one case in Surrey, officers arrested nine people at a caravan park who had been working as delivery drivers.
At one one major operation in March, officers arrested 36 people at a building site in Belfast's Titanic Quarter. Some had breached visa conditions while others didn't have working rights.Immigration Enforcement director Eddy Montgomery said there were many cases where people travelling to the UK were "sold a lie by smuggling gangs that they will be able to live and work freely in the UK.
"In reality, they often end up facing squalid living conditions, minimal pay and inhumane working hours," he said.
Dame Angela Eagle, the minister for border security and asylum, said the government would "continue to root out unscrupulous employers and disrupt illegal workers who undermine our border security".From 2027, the pact will allow both the US and UK to base a small number of nuclear submarines in Perth, Western Australia.
It will also create about 7,000 jobs in Britain, with the design and construction of the new fleet of nuclear-powered submarines set to take place in the UK.The benefits for the US are less obvious - but sharing its defence technology could give the nation an opportunity to grow its presence in Asia-Pacific.
Arming Australia has historically been viewed by Washington and Downing Street as essential to preserving peace in a region that is far from their own.When Miriam Haley heard the news last year that a New York court had thrown out a rape conviction against Harvey Weinstein, the man she helped put behind bars four years before, she was shocked.