Got a route you would like us to try, please do send it across, and we will try and have a look, and maybe even add it onto our site.
We have been using plotaroute.com for some of our walks, as it gives some really useful features which will hoefully help you use the route in a way that suits you best. There is the ability to download the routes to your Garmin, or just print them off. We would recommend just printing the map out though, but setting it to show paths, and also our directions as well.
There are also other routes we have mapped, but not yet tried out, so if you would like to have a look, please take a look on our plotaroute profile page
Listing all the items in the countryside code is not possible, as they may change, but below is correct as of April 2017. Any changes to the below items will likely still align with the spirit of what is below:
(for further reading, please see the countryside code pdf available here)