A small and deflated red one that had somehow run the gauntlet of the commuting crowds tramping to the stations. I doubt it lasted until they returned.
As if the balloon-like shapes of the Regent Street Christmas decorations weren't enough, a clutch of genuine balloons had risen from the street to get ensnared by the decoration's support wire, where they hung like a bleak, if multicoloured, parody of the illuminated spheres.