Template:Flag Institute
http://www.flaginstitute.org/index.php?location=10&flagtype=&flagid=Template:FlagIDno
This template is used generate URLs at the Flag Institute, whose database uses numeric flag indices which change when they add a new flag.
This template permits them to be accessed by name and means that the numbers only need changing in one place (here) for all to work.
Use {{Flag Institute|Yorkshire}}
to generate a URL such as http://www.flaginstitute.org/index.php?location=10&flagtype=county&flagid=Template:FlagIDno.
List of supported flags
(This makes it easy to check each link works correctly)