Inspecting data with openstreetmap.org's data overlay and browser
The openstreetmap.org website has a range of tools you can use to inspect the data in the database, both current and past. Some of the tools aren't obvious from the front page of the site, but are easily found if you know where they are.
The tools, which consist of the data map overlay and the data browser pages, allow you to see the details of any object in the OpenStreetMap database, including coordinates, tags, and editing history, without the need to launch an editor or read raw XML. As these tools work directly with the data in the OpenStreetMap database, they always show the most up-to-date information available. However, they simply provide raw information, and don't provide any guidance on whether the geometry or tagging of any feature could be problematic.
The easiest way of inspecting data is to start with the data map overlay. Go to the map view and find Compton (or any other area you want to inspect). Open the layer...