BBC correspondent
Amid chaotic scenes, French police waded into shallow waters off a beach south of Boulogne early on Friday morning and used knives to slash an inflatable small boat – packed with men, women and children – that was wallowing, dangerously, in the waves.
All those onboard clambered to safety as the boat collapsed.
The intervention was highly unusual.
French police usually follow strict rules that bar them from going into the sea in case they put lives at risk.
“Let’s go in,” said one of the gendarmes, pulling off his body armour, and taking out a small knife. His colleagues took their heavy armour off, too, placing equipment in the back of a nearby police car before rushing into the water.
It is possible to see this rare incident as evidence that the French police – under growing pressure to stop a surge of small boat migrant crossings to the UK – are changing their tactics.
But well-placed sources in France have told us that the procedural changes now being considered will almost certainly focus on the use of patrol boats at sea to intercept the “taxi-boats” before they’re fully loaded, rather than on approving more aggressive interventions from police on the beaches.
A few metres offshore, the boat itself was clearly in trouble. People were crowded around the outboard motor, which had briefly stalled but was being restarted.
Waves were breaking underneath the boat, causing it to lurch wildly, and there were loud screams from several children who were in danger of being crushed onboard.
Earlier, two large groups of people already wearing orange life jackets had emerged from the nearby dunes and rushed towards the sea.
In all there were probably 80 or 100 people. But when the first “taxi-boat” – used by the smuggling gangs to collect passengers from various points along the French coast – sped past perhaps 100m from the shore, it was clearly full already and did not stop to pick anyone else up.
A few minutes later, a second boat, with almost no passengers, came towards the shore, watched by a French coastguard boat further into the English Channel.
Initially, people were ushered forwards in organised groups, holding hands, and directed by one man who appeared to be leading events.
But as the inflatable boat turned and reversed towards the shore, there was a scrum as dozens of people scrambled to climb aboard in water that was at least waist deep.
At first the gendarmes declined to intervene and stood watching from the shore.
One officer repeated a now-familiar explanation to me – that they were barred from going into the water except to rescue people.
But as the situation became increasingly chaotic, the officers at the scene clearly felt that a line had been crossed, that those on board were now in danger, and that there was a brief opportunity to disable the boat in relative safety and while any smugglers – who might have fought back – were distracted by their attempts to restart the engine.
As a policeman slashed repeatedly at the rubber, there were cries and shouts of anger and frustration from some of those onboard.
A young girl, who had been in the middle of the scrum, squashed at the stern of the boat close to the engine, was plucked to safety as others scrambled on to the nearby sand.
Moments later the boat was dragged ashore by the police as the migrants began collecting items they had dropped on the beach and then headed inland, up the sandy paths through the dunes towards the nearest village and a bus-ride back to the migrant camps further north.
