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BERLIN - The European Union faces a damaging split over moves led by Germany to impose a radical law and order package.
If enacted into European legislation, it would allow armed police to operate with impunity outside their home countries, privatised armed "sky marshals" on civilian flights and a wide range of joint operations against alleged illegal migrants.
Confidential documents show that Germany also wants to permit undercover officers working with criminal gangs to roam unrestricted across European borders.
The plans are provoking opposition among senior police officers.
"We have learnt the hard way how difficult it is to regulate undercover operations," one source said, citing a series of high-profile British Customs and Excise cases that collapsed in the Court of Appeal after irregularities came to light. "We need to be extremely wary."
Germany's plans threaten to derail or delay other measures allowing European police forces to share data, such as DNA and fingerprints. These have provoked criticism from civil libertarians, but have found broad agreement among governments.
Sources who attended the meeting say the Germans appeared to expect unanimous endorsement. Instead, they encountered "solid opposition" in key areas from Britain, Sweden and the Czech Republic. Further talks will be held in Brussels next month.
The German package began as the Treaty of Prum, an agreement signed in the German town of that name between Germany, France, Austria and four other countries in 2005 but never negotiated by EU policy-making bodies.
There was no consultation with the European Parliament - which scrutinises law and order measures.
Germany wants all 27 member states to ratify the treaty and so adopt it as European law. But going about it in this way means members must swallow it whole, with no power to amend it. A British spokeswoman said the UK was not prepared to do this.
"Though the Germans want it all, we think we can take some but not all of Prum into EU law," she said. Under the proposed package, sky marshals - who can be private contractors as long as they are "suitably trained" - would be allowed to carry guns on any flight, provided destination states are informed. In "urgent situations", armed police could cross from one country to another without notice, and "take any provisional measures necessary to avert imminent danger".
"I don't have to tell you how sensitive this is here," a senior London Metropolitan Police source said.
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