The government is expected to confirm later that 20,000 people have crossed the English Channel in small boats since Labour entered office.
The milestone has been reached in the five months since July’s election, after a big uptick in crossings this October compared to last year.
The number of crossings this year is still below those seen in 2022, when a surge in late-summer arrivals took numbers to record levels.
But they are up on last year’s totals, underscoring the scale of the political challenge facing Sir Keir Starmer’s government.
Privately, ministers acknowledge that successfully tackling irregular, illegal migration is key to the public’s perception of the government.
The number of migrants crossing since 5 July – when Sir Keir entered Downing Street – is understood to have tipped over 20,000 in the early hours of Sunday.
Overall, 20,290 people have crossed between July and November, more than the 16,927 during the same period last year.
This is largely due to a spike in crossings during the month of October, with Home Office sources pointing to a higher number of days during the month compared to last year when seas were calmer.
The number of migrants crossing in Labour’s first five months in office is similar to the 20,839 who crossed between July and November 2021.
The total is below the 31,264 who crossed in the equivalent period in 2022, the highest year on record for crossings overall.
Rwanda scheme row
Labour has scrapped the previous government’s plan to deport some asylum seekers to Rwanda in a bid to deter crossings.
No migrants were sent to Rwanda under the scheme, which was branded an expensive “gimmick” that would not put asylum seekers off coming by Labour.
Instead, the government says it will attempt to reduce crossings by taking action against the gangs that smuggle people into the UK.
It wants to give police more extensive powers to tackle gangs, and wants to step up co-operation with law enforcement authorities in other countries.
Last week, ministers unveiled a deal under which the UK will give money to Iraq to improve its border security, with the promise of greater intelligence sharing and more joint enforcement operations.
The Conservatives have challenged this approach, with shadow home secretary Chris Philp urging ministers to “urgently re-instate” the Rwanda policy.
