I was just wondering how often you update the routing database. I made some edits on OpenStreetMap around the 8th December last year, and I don't think they're showing up yet. I'd expect the route at http://cycle.travel/map/journey/10185 should go east and then south and then cross the A11 using the underpass -- unless there's an error in my OSM edits. From the route shown it looks to be using old OSM data.
Just over a month isn't a particularly bad lag, but perhaps it would be good to have a "Routing Database Last Updated" date shown somewhere on the site, to help with diagnosing any issues. Apologies if there is already and I've missed it.