How to read what is here
These pages exist to explain a subject in general terms. Nothing here is advice, and none of it was written with a particular reader's situation in mind.
Mistakes and changes
If a detail here would change what someone does, confirm it at source before acting on it. That is not a use this material is warranted for.
External links
Websites reached by a link are outside anyone's control here. Once a visitor leaves, that website's rules govern the visit.
Questions
Queries about anything written on these pages should go to [email protected].