You might consider these brokers which are domiciled in the U.K.:
[ul]
[li]dbFX — this is the retail brokerage division of Deutsche Bank; the bank is headquartered in Germany, but dbFX is domiciled in the U.K. and is regulated by the British Financial Services Authority;
[/li]minimum to open a standard account: 5,000 USD.
[li]IG Markets Ltd — subsidiary of IG Group Holdings PLC (UK);
[/li]minimum to open an account (mini or standard): no minimum.
[li]Alpari LLC — minimum to open an account (mini or standard): 200 USD.
[/li][/ul]
Also, consider the U.K. divisions of the following U.S. brokers:
[ul]
[li]FOREX.COM (UK) — the U.K. arm of Gain Capital Group LLC, the 4th largest independent retail forex broker in the U.S. (ranked according to Adjusted Net Capitalization); minimum to open an account: mini 200 USD, standard 2,500 USD.
[/li]
[li]GFT (UK) — the U.K. arm of Global Futures and Forex Ltd, the 5th largest U.S. broker;
[/li]minimum to open an account: mini 250 USD, standard 2,500 USD.
[li]FXCM (UK) — the U.K. arm of Forex Capital Markets LLC, the 6th largest U.S. broker;
[/li]minimum to open an account: micro 25 USD, standard 2,000 USD.
[li]CMS FOREX (UK) — the U.K. arm of Capital Market Services LLC, the 12th largest U.S. broker;
[/li]minimum to open an account (mini or standard): 200 USD.
[/ul]
Here are two websites which compare forex brokers (look for FSA in the “Regulated By” column; this stands for Financial Services Authority, and designates a U.K. broker, or the U.K. branch or subsidiary of a foreign broker).
Forex Brokers Information Table
forex broker|forex brokers firms|forex broker reviews ratings|forex brokers comparison
Here is a short blurb on the British Financial Services Authority:
Forex trading in the UK - issues and regulations
If you really want to plow through a long list of brokers, looking for those who operate in the U.K., here is a worldwide list of over 300 brokers:
Forex Broker Guide | Rate, Review & Compare Online Forex Brokers | Forex | Forex Brokers
I’m a U.S. citizen, residing in the U.S., but my forex trading is in the U.K. I trade through FXCM (UK), and I recommend them.
I have had no problems with my accounts, with my trades, or with customer service, with either FXCM (US) or FXCM (UK).