I will reach UK retirement age in September of this year – and as this just scrapes in inside the Brexit transition window, I will qualify for an S1. I understand the French government has agreed to respect S1s for 2 years after 31/12/2020, so this could be of significant benefit to me, but….. I will be drawing UK State Pension and continuing my microentrepreneur activity and have heard that an S1 exemption on French Social Charge only works if you have no other self-employed or salaried income. Do we know what the rule is, please? Thanks.