Rocket and cress hitting the roof

I sowed a car-wheel-size area with these and have been cutting'n'coming again, some of them were getting rather large to be honest, but when I went away for a week I thought they would be OK.  Except that they have gone totally barmy now, the rocket has developed flowers and both types have really thickened up.

Should I just pull the whole lot and start again, or can I just cut them right back and they will start to develop tender little baby leaves again?

If you leave a rocket plant to flower and seed you will have masses of free seedlings for years to come.
Sown late summer rocket will not run to flower so quickly - you can pick from Oct to April