https://www.autoexpress.co.uk/news/1...-how-they-work
"Many cars in Europe and the UK already have speed limit assistance that relies on info from GPS mapping and road sign recognition, but systems currently have to be switched on by the driver. Under the new EU regulations ISA will be active by default, although drivers will, for now, be able to turn the systems off at the start of each journey."
"For now, the ISA technology will only apply to all-new models launched after July 6. New cars already launched and in the showrooms will have until July 2024 to be ISA equipped. While the EU rules have been applied after Brexit so won’t be adopted automatically in the UK, there’s every chance we’ll get the same systems here regardless of any government action."