At slightest 430 migrants crossed the English Channel to the UK connected Monday - a caller grounds for a azygous time - the Home Office has said.
The section said it was taking "substantial steps to tackle the unacceptable occupation of amerciable migration".
The radical included women and young children.
It comes aft 8 boats carrying 241 migrants reached the UK connected Sunday.
So acold this year, astir 8,000 radical person reached the UK successful astir 345 boats.
The erstwhile regular precocious of 416 was acceptable successful September 2020.
Home Secretary Priti Patel has pledged to marque Channel crossing "unviable".
Dan O'Mahoney, Clandestine Channel Threat Commander, said: "There is an unacceptable emergence successful unsafe tiny vessel crossings crossed the transmission due to the fact that of a surge successful amerciable migration crossed Europe.
"People should assertion asylum successful the archetypal harmless state they scope and not hazard their lives making these unsafe crossings. We are continuing to prosecute the criminals down these amerciable crossings."
He added that the Nationality & Borders Bill would "protect lives and interruption this rhythm of amerciable crossings" and the authorities was continuing to instrumentality those with nary ineligible close to stay successful the UK.
Under the bill, which is presently being considered by MPs, it would go a transgression offence to knowingly get successful the UK illegally.
Migrants entering without support could look up to 4 years successful prison.
But the plans person been criticised by charities including Refugee Action, which has called them "extreme and nasty".