Gazz,
I can point you to this concise (American) guide.
http://skyandtelescope.com/observing...cle_1221_1.asp
In brief, Uranus is clearly a blob. Neptune distinguishes itself more easily under high magnification.
At brighter than 6th magnitude, Uranus is an obvious target for trying to sight with the naked-eye under dark skies. Neptune, at magnitude 7.8, ranks as a major challenge. Some observers are trying, but I've seen no successful reports yet.
Regards,