The HERE suite of mapping apps (HERE Maps, HERE Drive+ and HERE Transit) all now have new updates to download for current Windows Phone owners. However, the only thing that appears to be new is a revamped user agreement.
This is likely due to the recent selling of the HERE division from Nokia to a consortium of three German auto makers. While this update can be downloaded for people who already have these HERE maps installed on their Windows Phone, the apps themselves are still not visible in the Windows Phone Store. HERE previously said this was due to a ""technical issue hiding our apps from the Store" but they have still not apparently fixed this problem.
Thanks to everyone who tipped us!