Depends on what you like to eat and if you are planning to send off some younger ones for hogget/lamb this autumn too.
I would send them to market, Charrolais should make good money. Now is as good as any time - check what last weeks prices were for cull sheep. Whenever I bring anything to market there will also be cull sheep sold - tups and ewes. At the moment many farmers will be checking their breeding stock and selling anything that's not good enough for another year.