[j. d. worthington]

The title you're probably looking for is King of the City, which is touted as a sequel to Mother London, though Moorcock has denied it being so. I haven't yet had a chance to read that one (or, for that matter, anything else he's published in the past 3 years or so), but the little I have read would seem to support his claim; although (obviously) it is centered around the same themes/concerns as the rest of his work and, since it's set in contemporary London, perhaps that's what earned it this description.