Thanks. I still can't figure out how you get a neat finish with the carpet butting up to it, but I guess this is why I'll not be fitting it (though I should probably try and learn)
The gripper strips will be laid with a space between them and the skirting. The carpet will then be tucked over the edge of those and kind of down the face of the skirting.
Flush to the floor, or about as close as you can get it.