These obviously cover a wide swath of ground. Each theme is defined in some detail. There are a total of 1,102 data sets available online. These are listed alphabetically, by theme and by subject in the StatStore. The metadata is varied.
Most fields describe the pertinent statistical concepts, practices, or concerns.
The site also includes information about vital records and census records, and provides access to a number of services and publications. Although not exactly scaled for the average citizen, the National Statistics web site is overall very interesting and a resource that a person with a modicum of knowledge could use effectively.