Going by the boxrec p4p top 25 (the exact order isn't great, but they don't give credit for padded records, so it's not terrible for general info).
I would say the Brits are doing pretty well, though not as well as it seemed at that point in time when Hatton was yet to fight Floyd, Haye was still dominating cruisers, Calzaghe was near the top of the P4P list, Witter hadn't been beaten in 8 years, and a bunch of unbeaten guys coming up like Froch, Khan, Mitchell, Murray, Rees. Even Enzo Mac was on a seven year winning streak before being derailed by Haye. Alex Arthur was on a roll too. Things looked great then, but 2008/2009 was a bad year for many of those, and the picture looked a lot different after that.