A no-deal Brexit will make it harder for police to protect UK citizens as forces fall back on “slower, more bureaucratic” systems, one of the country’s most senior officers has warned.
If the country leaves the European Union in March without a deal, police operations including the investigation into the Novichok poisoning could be affected.
European Arrest Warrants have been issued for the two Russians suspected of the Salisbury Novichok poisoning, meaning that if they enter Europe they should be arrested.
However, UK law enforcement would lose access to the power if there was a no-deal Brexit, and police would have to go back to using 1957 extradition legislation that does not cover all countries.
Around 20 states that use the European Arrest Warrants are not covered by the convention.
Sara Thornton, chairwoman of the National Police Chiefs’ Council, spoke as plans were unveiled for a new unit that will oversee how forces use alternative systems in the event of a no-deal Brexit.
She said: “The fallbacks we're going to have to use will be slower, will be more bureaucratic and it will make it harder for us to protect UK citizens and make it harder to protect EU citizens.
"We are determined to do everything we can to mitigate that, but it will be hard."
‘It’s a longer, more complicated process’
There are 40 tools that UK law enforcement may lose access to, including the European Arrest Warrant and the Schengen Information System, an intelligence database that was accessed 539 million times by British authorities last year alone.
Ms Thornton added: "A very current example would be the two GRU officers who were responsible for the Novichok attack. If they are to step out of Russia into Europe there are European Arrest Warrants waiting for them.
"If we lose the European Arrest Warrant on March 29 because there was no deal, no agreement, then we have to rely on the 1957 convention and it's a longer, more complicated extradition process and they don't always apply in all countries."
Currently the arrest warrants are used 1,500 or 1,600 times per year by the UK. For every one Briton arrested on an EAW, eight are detained by British police on behalf of other member states.
The new unit has received £2 million in Home Office funding and will be made up of 50 police officers and staff.
Police chiefs across the country have also signed off on plans over potential public disorder and possible travel and border disruption.
Chief Constable Charlie Hall said: "At this stage, we have no intelligence to suggest there will be an increase in crime or disorder as a result of Brexit deal or no deal.
"Like other public bodies, we are preparing for possible outcomes and in each case we are working with the relevant government departments to ensure we are ready to respond."