I've created a test site online at accomodation_and_venues.php. Click on the more info link to get the detail.
It is now doing the same thing that I first mentioned - content has gone and map is showing USA, not my location.
I notice that when I put in the postal address it seems to wipe the content. In the DB this field is called Address. If I add Town and postocde it seems to at least show the map, although the location will not be accurate.