Oh yes we've done the carpet trick @gillianpearce 🙂 That helped a lot in the area where the polytunnel is; it's a very effective method, actually even thick cardboard works but it breaks down too much and it's got glue so we avoid that.
I do the cutting in 'batches', so it does hurt a bit but can rest afterwards as well... I've just come in from watering some of the plants and it's easier to walk...
The area I show in the photo was the same height as the area you can see behind the chicken area : very dense though mainly nettles there.