You may remember that I have six plants on the go, two each of three different types. In this next photo you can see that the shape of the three types is very different.
My view was that if I removed some of the lower leaves, not only would the plants put more energy into the formation of sprouts, but also the sprouts would benefit from a greater level of light, and air circulation - as indeed would the Endives underplanted beneath them.
This is "Before".
And this is "After".
"Napoleon" is a tall variety and it is producing a lot of sprouts!
This variety is "Bosworth", whose sprouts are still very tiny:
This is how the bed looks now.
Incidentally, I plan to remove the net in a few weeks' time, to further improve airflow and thus reduce the risk of fungal infections, but there are still plenty of white butterflies about so I'm not doing it just yet!