So, what could happen if EU talks fail?
DRIVING LICENCES
Motorists could find that their driving licences are no longer valid when travelling on European roads. Britons may be required to have for an International Driving Permit (IDP). The documents, which cost £5.50, can be obtained at the Post Office. However, there are two types of permit used by different EU countries so those driving across the continent could need both.
PASSPORT EXPIRY DATES
Travellers wanting to visit the EU could be required to have six months left before their passport expires or risk being turned back at the border. British citizens may also only be allowed to stay in an EU country for a maximum of three months. Currently, there is no requirement for Britons travelling to the continent to have a minimum or maximum amount of time left on their passports before they expire.
SPACE DEBRIS
Britain could be left reliant on the US for data on falling asteroids and satellites. The EU is currently building a system designed to protect satellites from crashing into other equipment or debris, but the UK could be blocked from accessing its information after Brexit. The EU Space Surveillance and Tracking programme will provide an early warning on material crashing to earth.
CAR MAKERS
Cars made in the UK may no longer be valid for sale in the European Union. Type approval, which demonstrates that vehicles comply with safety and environmental standards, would not be valid for sales in the EU if issued in the UK. British manufacturers would need to obtain type approval in an EU country to continue selling their products there.
MOBILE PHONE ROAMING
Vodafone, Three, EE and O2, which cover more than 85 per cent of mobile phone customers, have said that users will still not face extra charges for roaming while on holiday in Europe. Ministers will also legislate to introduce a cap on charges. It would set a £45 per monthly billing period limit and force companies to send alerts when 80 per cent of that had been reached.
EXPORTERS
HMRC has written to 145,000 businesses that only export to warn they could have to complete new customs, VAT and declarations. Millions of products on sale in the UK carry the small CE mark – which shows they have met EU-wide product safety rules. In a no deal scenario, products that have been tested by a UK-based body may face extra checks by the European Union before going on sale there.