Britain is activating a key government committee to look at the fallout from suspending cooperation over Northern Ireland, Sky News reported on Thursday.
French fishermen lack half the licences they need to fish in British waters and which Paris says are owed them after Brexit, France's government said Wednesday, adding it was working on possible sanctions that could affect power supplies to the UK.
Thierry Breton, the French politician who is also the European Commission's internal market commissioner, said on Tuesday that Brexit was a "catastrophe" for the United Kingdom.
British Brexit minister David Frost said on Monday that the European Union's proposals to solve the problem of trade involving Northern Ireland did not go far enough and significant gaps remained between the two sides.
The United Kingdom said on Saturday that talks with the European Union over post-Brexit trade rules for Northern Ireland had been constructive, but substantial differences remained.