I've just used the Navigation feature in Google Maps for the first time in a few months, and I've found that the voice has changed. Previously it had a British voice, but now it's using an American one. Does anyone know how to change this back? Everything I've found so far says to change the Siri voice settings, but that's still set on British so it seems that this setting is no longer respected in the current version of Google Maps. How can I restore the British voice?