Information, not advice

These pages describe how something works. That is not the same as advice fitted to a reader's own position.

Errors and omissions

Care goes into this material, and even so it carries no promise of being complete, current, or error-free. A subject can change after a page about it is written.

Sites linked from here

No control is exercised over any website reached through a link. From that point their terms and privacy practices are the ones in force.

Getting in touch

If you need to raise something about a point covered on these pages, use [email protected].