Re: Maps are useful, but things change
At times, Google is more up to date with its stuff given it pulls data from a variety of sources, including the OS. Case in point:
OS: https://osmaps.ordnancesurvey.co.uk/51.5968055,-1.2752334,16
Google: https://www.google.co.uk/maps/@51.5968055,-1.2752334,16z
Google shows the new Harwell Village bypass (the little road to the east of the A34), OS doesn't. The road isn't even open yet... yet Google already includes it. This comes from the Highways Agency whose proposals to the Oxfordshire County Council (well, the SODC) included the complete alignments...