Yes, the London region already published a test advisory to verify that all systems are working. It illustrates what a real one could look like: https://www.met

Yes, the London region already published a test advisory to verify that all systems are working. It illustrates what a real one could look like: https://www.metoffice.gov.uk/public/data/vaac/vag/pfxd01_egrr_101453_202311.png https://www.metoffice.gov.uk/public/data/vaac/vag/pfxd01_egr... The northern part of the Atlantic route system (EU-US) goes through there. And big parts of UK airspace could be affected.