We have seen a number of different views on the issue of working in the UK and France depending upon the official residence. How about this situation: Live and work self employed in the UK. Have a second home in France. Would like to work in France for some of the time as an extension of existing business dealings - building, plumbing and occasional removals, haulage. Can we register in France for a siret number and work occasionally in France as an extension of our main employment in the UK? Any thoughts? Where would we find out more?