Google Map's directions doesn't work between postal codes in the UK, unless you specify the space. And it hasn't worked for about a year. I must say, I find Google Maps quite difficult to use.
You could try alternatives like OpenStreetMap. In the Netherlands, Germany, France and nearby countries the map quality is often better (and more up to date) than Google Maps, but I don't know about the UK.
For navigation there are separate websites that use OSM data, like yournavigation.org (not sure that's the best one, I just know of it). They often work a bit differently than Google Maps so there might be a slight learning curve.
There is also Bing Maps which has great areal imagery if you're looking for that, only their map quality isn't as good. Certainly not terrible either, though.
For navigation there are separate websites that use OSM data, like yournavigation.org (not sure that's the best one, I just know of it). They often work a bit differently than Google Maps so there might be a slight learning curve.
There is also Bing Maps which has great areal imagery if you're looking for that, only their map quality isn't as good. Certainly not terrible either, though.