If there was a possibility of circling and then landing on 27 after doing the 09 approach, I would have briefed it. If the circling MDA for 27 is higher, and your terrain clearance for your category (cat C: 400ft AGL; assuming day operations) can't be assured for the whole of the circle onto 27 (local knowledge required), to be on the safe side I'd do a missed approach and then do the 27 approach, although this would depend on your configuration and company policy.
It might be acceptable to zip back up to the 27 circling MDA and then circle as desired, particularly if you are still at the circling configuration, not landing config.