Home Office data indicates that a decrease in small boat migrant arrivals in the English Channel this year is partly attributable to unfavorable weather conditions, a finding that has fueled a political dispute between the governing Labour party and the opposition Conservatives.
According to Home Office data released on Thursday, the number of days with weather conducive to illegal dinghy crossings, termed 'red days' by officials, was 110 between January and the end of August. This represents an 11 percent decrease from the 123 'red days' recorded during the same period in the previous year.
The data suggests that this reduction in favorable crossing days is a contributing factor to a 44 percent fall in small boat arrivals year-to-date compared to 2025. Home Secretary Shabana Mahmood, however, asserted that weather conditions had no impact on the number of arrivals, attributing the decline solely to government policies aimed at border control. "Small boat crossings are down significantly, with the lowest number of arrivals over the summer since 2020," Mahmood stated. "The data clearly shows this is not because of crossing conditions, but thanks to our efforts to restore order and control at our border."
Mahmood also noted that the average number of migrants reaching Britain on a typical 'red day' had fallen to 144 from 232 the previous year. The Home Office data further showed that the average number of migrants arriving on 'red days' this year was down 43 percent from its 2022 peak, decreasing from 251 to 144.
Conservative lawmakers accused the Home Secretary of misrepresenting the data. Shadow Home Secretary Chris Philp argued that the decrease in 'red days' directly implies that weather conditions have been more challenging for migrant crossings. "There are fewer red days this year compared to last - so the weather has been tougher for migrant crossings," Philp said. "Labour are twisting the facts by attempting to claim the weather has nothing to do with the year-on-year fall in small boat arrivals. The Home Office’s own data shows there have been fewer days so far this year when there were favourable crossing conditions for small boats."
Philp added that nearly 20,000 illegal immigrants had crossed the Channel so far this year, which he deemed "20,000 too many." He criticized the Labour government's £660 million deal with France for patrols, stating that "French officers [are] standing by doing nothing while illegal immigrants embark." The Conservatives advocate for a plan that would involve leaving the European Convention on Human Rights to facilitate the deportation of illegal immigrants within a week of arrival.
A 'red day' is defined by the Home Office when factors including wind speed and direction, along with other considerations such as the estimated number of migrants awaiting crossings, indicate that crossings from France are 'likely' or 'highly likely'.
Labour has stated its strategy to address the crisis involves investing in operations against people traffickers, a shift from the previous government's Rwanda asylum plan, which Labour scrapped upon taking office. The £660 million, three-year agreement with France has led to an increase in anti-migrant beach patrol officers to over 1,000.