Domestic panels are what we call embedded generation - they are connected to the distribution networks, not the main transmission network. The System Operator (NGESO) doesn’t have real-time insight into the distribution networks themselves - they are just visible as a net demand on the system. Embedded generation serves to reduce this demand by feeding power locally to the distribution network.

We can forecast the embedded generation in real-time, but it’s only post event once the meter data has been accounted for that we know what actually happened.

Interesting, thanks! Does that also mean power fed-in by domestic panels will only be used locally?

Wrap them around a piece of scrap cardboard.

Alternatively go buy a few of those orange plastic extension cable wrap things from the electrical aisle at a big box store (either the plastic ones that are flat, or the big circular ones with a handle). I've had them for a decade, and every year I wind up my cords on them, and they always unwind easily the next year.

then cut some 1" slits in it to keep them in place.