Sorry for waffling on (it's a slow Saturday night)...
I've never caught a catfish, but there are some day ticket lakes around here that have them.
They're not a native species to Britain, I guess they were introduced (Wels catfish that is) to give some variety to the carp and pike anglers. Inevitably some have gotten into rivers and canals, I don't know what impact they have but I hope they eat the American Signal Crayfish (it's caused the major decline of our own native crayfish).
I think most UK guys who bait fish for catfish use carp and pike rods that are 12ft long and have a 3lb test curve, Shimano baitrunner reels and 18lb mono (or 50lb braid). This seems to work for up to 50lbrs, beyond that weight they switch to more specialist tackle.
I'd love to go to the River Ebro in Spain, large numbers of Wels catfish can be caught and you have the chance of a 200lber!
You can effectively catch the European catfish on just about anything, live leeches and earthworms, live and dead fish, boilies, halibut pellets and even on lures.
Europeans also use the "clonk"... this Dutch video illustrates the technique perfectly, although I wouldn't try it where there were alligators or crocodiles!
http://www.youtube.com/watch?v=1xBVF96SjKQ&feature=related
Notice the live eel as bait...
I'd really like to catch one on a lure, I reckon it would be FULL ON!
Here's two vids of a Spaniard playing and landing a big Wels on light lure tackle.
http://www.youtube.com/watch?v=_nmE7A2krbo&feature=related
http://www.youtube.com/watch?v=m7nFPUDVrmI&feature=related
I guess stronger tackle would be preferred from the shore?
p.s. Dipbait, LOL drinking and fishing!