Richard
Is this definitely a separate cycleway (highway=cycleway) rather than a painted line on the road (cycleway=track)?

Geograph suggests the latter (http://www.geograph.org.uk/photo/998192) and I'm pretty sure I don't remember a cycleway here, but it's a long time since I've been this way.

Same applies to cycleways mapped between here and the A40.

(If it genuinely is a cycleway, it needs the connectivity fixing at either end!)