The fork happened on August 1. So your Bitcoin cash will be in your wallet where they were on August 1.
I don't know if you can access your private keys on blockchain.info. I think so. But you'll have to have access to your private keys.
Again, this will be the same pattern. You will first move your BTC into a new wallet. Then your Bitcoin Cash will have remain in the old wallet. You will download the Bitcoin Cash wallet and there will be a way to enter your wallet through there. I never used blockchain.info.