Horley to Horsham, off road, avoiding Gatwick?
I don't think you can do it off road. I'd take the lanes West from Horley and go round the other side of Gatwick, avoid most of Crawley, rejoin your route around Ifield.
Thanks I can see a route that looks interesting, so I'll try that.
Now to figure out how to tidy up the section around Shere and past Box Hill!
@Alex_B started
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I don't think you can do it off road. I'd take the lanes West from Horley and go round the other side of Gatwick, avoid most of Crawley, rejoin your route around Ifield.