::: Every year my carrots have carrot root fly.
::: The ones I'm digging at the moment have to have about 30% cut out
::: and thrown away.

Or try making a wooden compost filled open framework at least 18" above
ground as per the Big Dig allotment programme last year. Apparently the
blighters don't fly that high. I'll let you know later!

Errr, didn't work for us! This year we will use envirofleece over the top
too.

Please tell me more.
I haven't heard of envirofleece.
Where do you get it?
Is it different from the ordinary white fleece from the garden centre?
And how would you do weeding?
If you removed the fleece to do weeding, wouldn't that let the root fly
in?
--
Chris