Not even Coinsbank? I always had the impression that the general Brit was quite satisfied with how that exchange has been growing throughout the years. It's a tiny market when it comes to GBP, but they are by far the largest exchange in that segment. That being said, most of the banks allow you to have a dedicated USD account for international minded clients, which could be an option for you to consider. I have dedicated EUR/USD/CHF accounts for years, and have been capable of expanding my international reach significantly with these bank accounts. They however charge pretty steep fees in my case, but as long as I get more than it costs me, Ill keep them.