@damien @Edent In my town all the main taxi companies use icabbi (which works quite well, at least from a passenger POV) but due to being competitors have separate branded apps which go to exactly the same place! BITD the taxis did use VHF radio schemes (private business radio licence from DTI/Ofcom), but 10-12 years ago I noticed the radio traffic from these was disappearing and the drivers themselves told me they had all gone to using GNSS enabled apps..