I have a Griffin stylus. It's similar (or literally identical) to a number of others with a rubber dome tip. Some people find it a bit short. And many people find the "rubber dome" to "drag" occasionally on the screen. Many people (myself included) find the iFaraday brand (The website is exactly what you'd expect) to be superior. The iFaraday uses a conductive cloth tip that eliminates the "drag."
Another option is the Jot from Adonit or the Dagi stylus. They use a similar technology. A pointed tip designates the contact point and a plastic "collar" just above the tip activates the capacitive screen. Opinions about these differ rather widely. I like my Jot Pro and it works well once I figured out how to prevent missed strokes (requires a dab of conductive grease where the tip contacts the plastic collar. Others find the plastic tip to make an annoying clicking noise when it's used.
All in all, I'd recommend the iFaraday over the Griffin. And if you want a really nice stylus ($30) and are willing to put up with some shortcomings in the execution of the Jot design, it's a good choice, as well.
P.S. Just noticed you're in the UK. In view of that the shipping charges for the choices I noted may be a deal breaker for you. Sorry if that's the case.