I use W H Ireland, and have no hesitation in recommending them, their contact details are below. If you mention Paul Scott's Blog then you will qualify for a substantially reduced commission tariff. In the interest of complete transparency, I receive an introduction fee if/when new accounts transact.
Readers of my Blog will know that I would never recommend any product or service unless I am a completely happy customer myself, which I am.
With a growing number of my friends using W H Ireland too, we are building some useful firepower there, so that we can easily do group deals on small caps as they arise, so it has potentially spin-off benefits other than just being a good broker at a reasonable price.
I also find the Spread Betting service at WH Ireland to be very useful, as it combines the very low commissions of a spread betting product, with improved prices from a traditional telephone broker - the best of both worlds in my experience.