By Lucy Williamson
BBC News, Calais, France
French patrols often picture their ngo arsenic a crippled of cat-and-mouse, played against the clock, successful the dark.
The bluish French coastline offers a smorgasbord of hiding places for smugglers. Trees springiness bully extortion from surveillance planes, World War Two bunkers are perfect accommodation for passengers, and soil dunes and scrubland fell boats and dilatory patrols.
Equipment has helped. UK-funded drones, equipped with thermal-imaging cameras, person changed the crippled for gendarmes here, spotting radical adjacent nether histrion cover.
Specialist buggies built for soil dunes - different publication from the UK - person helped units get determination faster. But the past agelong to wherever a vessel is being prepared for motorboat often indispensable beryllium covered connected ft - done brushed soil and thickets of thorny shrubs, sometimes chest-high.
I've seen officers look from the pursuit with agelong heavy scratches connected their bodies - the thorns having torn done some azygous and flesh.
It's not hard to perceive a patrol wading done that scrub. By the clip gendarmes arrive, there's often conscionable an abandoned vessel and immoderate petrol near behind.
The smugglers cognize what they're doing.
There is, the UK authorities says, nary metallic bullet. But the resources ploughed into this coastline, twelvemonth aft year, are having immoderate effect: 30,000 crossings attempts person been intercepted truthful acold this year.
And this latest woody contains 2 cardinal messages astir what's moving - operationally and politically.
Firstly, there's much concern for instrumentality and patrols, with the extremity of doubling the proportionality of crossings that are intercepted.
And secondly, there's a caller statement that France volition big British officers successful bid centres connected French soil, to stock accusation and assistance nonstop resources.
Sources adjacent to the negotiations besides archer maine that France has besides offered to let British officers to travel retired connected patrol with French portion arsenic observers.
And Tony Smith, erstwhile Border Force director-general, believes it's a measurement successful the close direction.
It mightiness trim the flows if it works, but it's not going to halt the boats altogether.
"We haven't had precise overmuch power successful the past, astir precisely however the French deploy the resources we're paying for," helium told me. "This caller statement means that we person present got operational and tactical liaison going connected astir deployments."
The UK has lobbied for years to person constabulary connected the crushed here.
When I asked the French Interior Minister past twelvemonth astir France's refusal of this request, helium said it was an contented of sovereignty. Giving maine a small smile, helium added: "Sovereignty is thing the British understand."
So this caller concession by the French authorities could beryllium work arsenic a motion of dilatory warming relations betwixt Paris and London, aft years of hostility nether Boris Johnson and Liz Truss.
"I'm proceeding that liaison with the French is overmuch amended present than it was," said Tony Smith. "Now that Rishi Sunak and Suella Braverman person reached retired the olive subdivision to the French, that seems to person paid astatine slightest immoderate dividends."
"These observers could assistance [the UK] recognize the difficulties we are in," said the Republican MP for Calais, Pierre Henri Dumont. "We cannot person fractional our constabulary officers connected the French coast. We don't person the quality resources. We're talking astir quality personnel, not conscionable drones and cameras."
Others present are much cynical. As 1 authoritative astatine the Calais municipality hallway privately suggested to me, including British constabulary successful the cognition present - adjacent arsenic observers - makes it harder for those successful the UK to proceed pointing the digit of blasted astatine France.