British travellers heading to Spain have been warned to carry their passports or face potentially getting arrested by Spanish authorities.
19 million nationals visited Spain last year and the UK Foreign Office has updated its travel advice following the UK's exit from the EU last week.
Thousands of football fans are also set to converge on Spain's capital Madrid ahead of Liverpool's clash with Athletico later this month, Hull Live reports.
And Britons are now legally required to present their ID if requested by a police officer.
A driver's licence is not suitable in Spain - only a passport or a clear photocopy will please officers.
Officers also have the right to accompany foreigners like Brits back to their accommodation and request to see original documentation.
Spanish police routinely conduct passport sweeps of public events to locate criminals or people in the country illegally. If an unruly Brit refuses to co-operate, they could find themselves in a holding cell.
"The police have the right to hold you at a police station until your identity is confirmed," the Foreign Office warns.
"Always take care of your passport, as obtaining a replacement is costly and time-consuming. Remember to keep a photocopy or scanned copy of your passport somewhere safe."
Visitors are also reminded to keep an extra watchful eye on their possessions at airports, train stations and on public transport to avoid having their bag snatched by pickpockets.
It is also vital to keep a copy of your passport somewhere safe and never hand over a wallet if requested by someone claiming to be an officer.
Police officers have the right to stop people from taking photos or filming if they consider their personal security or that of a police operation or secured area could be compromised as a result. Doing so can be met with severe penalties.
