Back to the plot yesterday to put down more black plastic. I was pleased to find last week's efforts still in place, as it's so windy up there; several puddles have formed in the plastic which should also help to hold it down. I also spotted a water-boatman sculling about in one of them.
I bought a new rake, which was much better for pulling out all the dried grass and weeds left by the strimming, and cleared a lot of dead material from the plot. I also pulled out a vast amount of finger-thick nettle roots by hand; these have formed a network immediately below the surface of the soil. They come up easily enough, but invariably snap, leaving more than enough behind for a fresh crop of nettles. The nettle end of the allotment is very hummocky, but the soil seems in good condition under the weeds - I think the largest hummock must have been the compost heap in the past.
I got two more big sheets of plastic down, and scavenged around the plot for heavy things to weight them to the ground, as well as pinning them. Hopefully they'll stay in place for the two weeks I'll be away on holiday. When I get back I need to deal with a huge heap of weeds - to the tip, I think, along with the rubbish from the shed.