“There are certainly instruments that we may not have access to,” the Foreign Secretary said – ahead of a crunch decision whether to abandon the negotiations today.
But Mr Raab insisted the “big win” was control of UK borders, claiming: “That will mean we are more secure and more safe.”
Until now, ministers have ducked questions about what will happen to security data after a crash-out Brexit, as the talks have largely concentrated on the future trade terms.
On the BBC’s Andrew Marr Programme, Mr Raab was reminded that the police had warned that losing access to passenger records would “have a major impact on counter-terrorism and serious and organised crime”.
But he argued it was a “finely-balanced call”, because of the wider security benefits of ending the free movement of EU citizens into the UK.
And he claimed: “The EU has always said, even with a free trade deal, we won’t have access, for example, to the SIS databases.”
In fact, police and terror chiefs hoped to retain the ability to share that data if there is a deal, even if the process became slower and more cumbersome.
The UK alone has placed more than 4 million alerts on SIS II and forces used it a staggering 603 million times last year.
Last month, police said they were scrambling to save the vital details of suspected criminals and missing people on SIS 11, with names “double keyed” into the Interpol system.
On the trade talks, Mr Raab warned the EU would have to move “a long way” for the talks to succeed now, attacking its “outlandish” demands which “don’t get more reasonable by repetition”.
He attacked the threat of a “torpedo of tariffs which threatens the relationship in the future”, reflecting the UK anger that the EU wants to impose unilateral punishments for perceived rule breaches.
Mr Raab said London wanted “to narrow the issues if any disputes arise in the future”, hinting it might accept the threat of tariffs restricted to a particular sector.
But he criticised “a nuclear-style type reaction”, of wider tariffs that “go up and we are back in the same old drama and soap opera every couple of years or even sooner than that, just because there is a particular issue around a particular sector”.
“I think it is about making sure that we’ve got a relationship that we can preserve and nurture that isn’t actually going to continue to be a thorn in both our sides,” the Foreign Secretary said.