Unfortunately, JDM cars cannot be updated with UK map data. The unit in the glovebox needs to be replaced with a UK unit and the car reprogrammed for the UK.

Unfortunately, VW have removed the option to add speed cameras in their MIB3 units - there is no workaround unless they decide to add the option at  alter date via a main dealer software update.

You can identify the MIB3 unit as they no longer have any SD card slots and there is a smaller USB0C socket in the car.