Here is an update version on UK government guide to living in france which include more information about how to get help if you have difficulty in applying for residency. As well as all the rest about healthcare, driving licences etc*
I’ve pasted the section here in case you know of people who might fimd it useful
UK Nationals Support Fund
On 6 March 2020 the FCO announced funding for organisations to provide practical support to UK nationals who may have difficulty completing their residency applications.
These organisations will help individuals who may find it harder to complete the necessary paperwork to secure their residency rights, including pensioners, disabled people, those living in remote areas or who have mobility difficulties, and those who require help with language translation or interpretation.
In France, three organisations are providing this practical support: The International Organisation for Migration in Brittany, Normandy and Paris, The Franco-British Network in the Dordogne, and SSAFA specifically for veterans across France.
If you or someone you know may have difficulty completing the application, you can contact them using the details below to discuss how they may be able to help you.
The International Organisation for Migration (IOM)
Email: UKnationalsFR@iom.int
Hotline: [0809 549 832](tel:0809 549 832) available during the following hours:
Mon-Tues 14.00-16.00 and Wed-Thurs 10.30-12.30
Website: http://iomfrance.org/support-uk-nationals-france
The Franco-British Network (FBN)
Email: The Franco-British Network
Website: https://francobritishnetwork.fr/
SSAFA – The Armed Forces Charity
Email: ukvie.support@ssafa.org.uk
Hotline: +33805119617
Website: https://www.ssafa.org.uk/