The UK government has announced it will leave the EU Single Market. We have been told that unless the UK negotiates a specific trade deal with the EU, trade rules will automatically fall back to WTO rules. We have also been told that the UK wishes for freedom of movement with the EU to end.
Trade is only one aspect of a deal between the UK and the EU. If the UK and the EU would fail to negotiate an exit deal before the deadline, is there any default fallback related to visas, tourism, and immigration?
For example: currently, the UK has no specific rules on visa requirements for EU citizens, because EU treaties grant freedom of movement. Barring a wider post-Brexit agreement on EU-UK travel, would the UK need to make bilateral deals with individual member states regarding visa-free travel, or can the UK decide on the visa regime per EU member state unilaterally? My question applies to either short-term visas for tourism or business, or longer-term residency visas such as for work.