The Financial Times report on documents it has seen from the EU warning UK companies they may not be able to operate in Europe after Brexit

  • documents call on companies to be ready for the UK to become "a third country" on March 29 2019, with no automatic right to operate in the single market.

This would be in the event of a 'no deal' Brexit

More:

  • EU regulators issued the "be prepared" memos to around 10 industries in November and December

here is the link to the FT, which may be gated