France is backing away from a recent commitment to intervene more forcefully at sea to stop small ships crossing the English Channel, sources have told the BBC.
According to the British network, there is evidence that the current political turmoil in France is partly to blame, but this will come as a blow to the UK government's efforts to tackle the issue.
Meanwhile, dangerously overcrowded ships continue to drift away from shore almost daily, from a shallow tidal channel near the port of Dunkirk.
While the man in charge of UK border security, Martin Hewitt, has expressed his disappointment at French delays, the BBC has heard from a number of sources in France that promises of a new "maritime doctrine", which would see patrol boats try to intercept boats and tow them back to shore, are futile.
"It's just a political stunt. It's very blah-blah," said a figure closely linked to French maritime security.
Former Interior Minister Bruno Retailleau was widely praised, not just in the UK, for pushing for a more aggressive approach in the Channel.
This culminated last July with a summit between President Emmanuel Macron and Prime Minister Sir Keir Starmer.
The focus then was on plans to intercept the so-called "taxi boats" now used by smugglers to sail near the coastline, picking up passengers already standing in the water.
French police rarely intervene against overcrowded taxi boats, as this is considered a very high risk for both officers and civilians.
But a few days before the summit, we saw French police entering the sea, south of Boulogne, to cut off the sides of a taxi boat as it got stuck in the waves and approached the shore.
In London, the prime minister's spokesman immediately reacted to the footage, calling it "a truly significant moment" and evidence that the French were starting to take tougher measures to stop small boats on the coast and, potentially, at sea.