Even without trade treaties, existing laws to protect wealthy investors - not the ordinary pleb ! - mean the UK could be sued over Brexit
iirc, Hammond reserved some billions in an earlier budget for this.
In the Times, item no. 4736 in the series:
"everything you always needed to know about Brexit but they were too afraid to tell you beforehand…"
“The government could face multibillion-pound legal claims from foreign investors if their profits suffer because of Brexit, investment lawyers have told The Times.
International arbitration specialists have been advising overseas companies that
if they lose access to the EU single market, they could sue the UK for damages under its bilateral investment treaties with their home countries.
Holger Hestermeyer, an international dispute resolution academic at King’s College London and former staff member at the European Court of Justice, said:
“The EU’s so-called divorce bill has sparked much excitement.
“It is insignificant, however, compared to the damages the UK might have to pay to investors if they successfully take the UK to court for damages they suffered because of Brexit.”
Britain has 95 bilateral investment treaties, including with Hong Kong, the United Arab Emirates and Russia…”