Which carrots for clay?

Thanks for the tips folks. 

Whilst aware I wanted 'pointy' carrots for my soil, I was finding it hard to figure out which these were.  Early Nantes & Autumn King seem to be a fairly standard choice so would seem a good bet for my first attempt.

Whilst I can see how a raised bed would benefit various crops, we only got the plot a month ago & that sort of upgrade is going to have to be a year 2 project    £30 worth of enviromesh should be enough to cover my brassicas & carrots with one piece, providing my carrots will be happy enough alongside them? (4beds = 1 peas/beans 1 potatoes 1 Onion/related & 1 brassicas.  The carrots have to share with something so I figure why not put them where they can share a 4x5m single piece of mesh)

Thanks again,

Bod

The issue of manure content was one that concerned me too.  For this year the brassica plot (4x4.5m) has has 4x50l of homebase farmyard manure, which I believe to be on the underdone side from what I've seen from others & read here.  Hence my hope of getting away with it 

My other thought is to sow the later (Autumn King) carrots straight into where my Nov planted onion/garlic/peas are, once harvested.  This has had only chicken pellets so far (it was planted within 2 weeks of getting my hands on the plot), so may provide me a comparison test to the earlies. Assuming carrots are suitable to follow straight on from onions and/or peas?