OS data on Google Maps
The Met's map is of particular interest to people mapping things in the UK with Google maps: the Met are clearly displaying area boundaries that are based on Ordnance Survey data, and this currently falls foul of the combined OS and Google Maps API licences (OS claim Crown Copyright on all derived data, Google requires rights to the data that OS refuse to give it).
Will the OS sue the Met before the government's threatened changes to OS derived data rules in the next budget?