Which typeface is this on Studio Output "About Us" site section? "London/Nottingham"

It is not Helvetica, it is not Univers, it is not Aktiv Grotesk (althought I thought it was, the "a"'s are very similar, but Aktiv's "i" has a squared dot while this is rounded.)

So, anyone knows which typeface this is?

Love that lowercase "a"!

http://www.studio-output.com/about