I think we do need to go thru the route with a fine toothcomb once we have sorted out the general places we are going via. Just a small glance at various points brings up lots of little hmms.
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I'm sure its been loosley plotted so far with a standard routing site, so it always throws these sorts of things up. And going thru it will be mind numbingly dull, but I can do so when I have a little time and once the main route is set in stone.
The more we can minimise little things like this, the easier it will be on the day / night.