I've just finished Benedict Jacka's Alex Verus books and if I didn't know, I would have sworn it was just Jim Butcher just messing around with a British version of Harry Dresden set in London. I didn't like the character quite as much as Harry, but really there are a remarkable amount of similarities.
Anyway, it made me decide to re-read all the Dresden books again from the beginning and so far, I'm quite enjoying myself. I forgot how much fun the first few books were, before it got slightly more serious.