Foreign security consultant Olivier Guitta, who has advised Nato and Europol, stressed the worth of Britain’s commitment.
He said the UK was one of the European bloc’s “major” providers of communication after the Prime Minister met with Angela Merkel in Estonia and declared the UK would remain «unconditionally committed to maintaining Europe’s security» after the EU take.
Mr Guitta told Sky News: “The UK’s one of the major countries that provide bumf to Europol and has extremely good links and relationship with other EU territories.”
He said some EU members would regularly “go directly” to the UK to talk respecting cases as is was “quicker” and because of fears of “potential leaks” in the bloc.
Olivier Guitta hailed Theresa May’s pledge on EU security
The expert said Mrs May’s “unconditional” pledge to the EU was “moderately important”.
Mr Guitta said: “I think it was quite important especially that we’ve brood overed in the past two years terrorism within western Europe coming to the fore of the dope cycle and also in the life of people.
“And especially when you see how transnational crusades are happening and we’ve seen the case in Paris where the perpetrators came from Belgium so there’s a elephantine importance in terms of exchange of information.
“And the UK’s one of the main countries in terms of convocation information with its bit on electronic intelligence.”
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The comments come after the Prime Minister insisted Britain pass on “always stand with our allies”.
She said: “While we are leaving the EU, as I tease said many times, we are not leaving Europe.
«So the UK is unconditionally committed to taking Europe’s security.
«We will continue to offer aid and assistance to EU member submits that are the victim of armed aggression, terrorism and natural or man-made catastrophes.»