It isn't Rian Hughes's Regulator neither.

no takers, so I'll give it a shot myself.
looks like House Industries' Neutraface Display Medium Alternates.
hope I got it right.

I was searching similar font while a ago and Neutraface was actually the closest one I found.
It's pretty close to Neutraface Display Medium Alternate, E and S are quite different in Neutraface though.

Identifont says : http://www.myfonts.com/fonts/urw/avernus/medium/

check out the "R"'s where exactely how far Avernus is from this sample shows out clearly.

ooops... too much hurry. Very far from the sample indeed.

I have to agree with George. I can't seem to get my small caps to work for some reason, but I'd guess that this is set all small caps as well. The bottom juncture of the W is closed a bit more than the cap