I have found a fellow gardener of my own heart! She seems to have produced a catalogue and encyclopaedia of our garden at www.gardenwithoutdoors.org.uk/weed_guide.
This lady takes photos of suspected weed seedlings and records them as they grow and flower, and she takes cuttings of weeds!
I found her website when trying to identify a horrible climbing weed that has appeared in our hedge. terrified it was knotweed - but turns out to be black bryony. Not so terrifying but nasty and apparently poisonous, so it's on to the bonfire for that nasty.