Kevin, I cleared the Maps cache (ie. Maps menu (via the three dots at top RH corner) > Settings > Offline and cache > Clear all map tiles). If there is another cache for the system, I would be interested to know about it as it might come in handy in the future.
Tabletnovice, Like you i am a newbie with this stuff and there are far more experienced people out there than me but I don't think the maps POIs such as gas stations will show on downloaded maps. That said, the map of Calais (Northern France) that I downloaded certainly showed a few hotels, albeit, not the actual one that I was interested in! I did a quick test before posting this and went to an area that I used to live in just outside of London and got told Google Maps to indicate pubs but, when I asked for the map offline, the pubs were not on it. As I say, I am a newbie and others will know more and might contradict me.
Finally, perhaps I should put any problems with taking screenshots down to my sausage fingers pressing buttons in the wrong place rather than blaming the Nexus or Android!!
I still wish I could sort out the renaming issue and any more advice would obviously be much appreciated.
Thanks for the help thus far.