It's 35 minutes to the office in SwineTown, once you've joined the M4 at Bracknell (A329M) at a steady 85(ish). Last time I went there were lots of point-to-point cameras near Reading, keeping you to 50mph. Although, obviously as they take the picture from the front, you can still hoon along like a mad thing on a motorbike
Getting the A329(M) / M4 junction takes about an hour from Sutton, as long as the traffic is kind.