French police forced to watch on as migrants in Dunkirk attempt perilous Channel crossing

As the first light breaks across a quiet beach near Dunkirk, a human tide begins to move.

Dozens of migrants, many with children, rush across the sand toward the water's edge. French police are present, but they do not intervene.

For many of these men, women, and children, this moment marks the final chapter of a journey that began months ago, fleeing war, persecution, and economic collapse in countries as far afield as Iran, Eritrea, and Sudan. Now, they face the potentially deadly crossing to the UK in a flimsy inflatable boat.

We watched as one vessel emerged from an inland waterway already crowded with people. The vessel is soon dangerously overloaded.

Floating haphazardly, a baby is yanked onto the boat, as they yell out for more people to climb aboard. Despite the dinghy taking on water - scooped out with a shoe - the crossing continues.

On the shore, police officers stood by, watching. When I asked why no attempt was made to intervene, one officer said: "It's for their safety.

"There are children there. We're not going to throw grenades at them.

It's inhumane. But it's sad." French police protocol, along with international law, makes such interventions legally and morally complex once boats are afloat - especially when families are involved.

Despite millions spent by the UK government to curb these crossings, the numbers continue to rise. As of the latest count, almost 15,000 people have already made the perilous journey across the Channel this year.

Many more are expected this summer as the weather window widens. In the makeshift camps near Dunkirk, migrants wait their turn for the smugglers to signal that conditions are right.

Ali Reza told us he fled Iran after converting to Christianity. He dreams of reaching Britain, where he hopes to claim asylum.

He said: "Britain is good and accepts refugees. It has good behaviour for refugees.

"I think I'll get a good welcome. Many Iranian people go to Britain.

There's good behaviour." Read more from Sky News:Spending review: The key announcementsThree-day thunderstorm warning issued for parts of the UK Back on the beach, not everyone manages to get aboard. The boat taxi service is in high demand.

Among the group, a woman from Eritrea spoke with me briefly. Although she missed today's crossing, she vowed to try again later in the week..