It's called
Pen Paddle Move on volume seven of
Mind Mysteries. The basic moves are the same as usual, but Richard has his own particular touches. If you are really interested, you should read the seventh volume of the accompanying guide books to the DVDs as well. In the book, Richard points out that quite a few magicians were dismissive of this trick, but that they missed out on the effect it actually has.
Having said that, I am not sure if you can get hold of the pens in the UK, so this might be an expensive wild goose chase. However, I had a very quick look round and found these:
http://www.pens.co.uk/plastic-pens/key-shuttle-pen.phpThey aren't the same as the one Richard uses, but I suspect can be used in a similar way. You might be able to get a sample pen from them, for you to have a play with before ordering. As usual with this sort of thing, it is quite expensive initially, because you have to order a lot of pens, but that's the point of a giveaway, isn't it?