Gregory's Server
Just over a week later and, after drying in the attic suspended in an old pillowcase, I have myself about a kilogramme of fine clay. I'm quite impressed by how close this stuff feels and behaves to the 'professional' redware clay I bought to compare against. Maybe I'll try making something with it over the next few days.
I'm sure it's bloomin obvious to anybody that's been doing pottery for a while, but the fact that clay is so easy to produce yourself (provided you have the soil for it) is quite enjoyable.