This is a Grand tour! Buckinghamshire - The Chunnel - through Belgium - entering the Netherlands - over to Germany - up north to Lubeck - two ferries through Denmark - crossing a bridge over to Sweden - then up to Varberg. A total of 977 miles (calculated on highways), and then back again..... The landscape of Southern Sweden is extremely flat, as is Denmark and possibly the route through The Netherlands. Belgium I do not know so well. Of course you can avoid highways and go on B-roads etc, but that would be even longer. When you say that the main purpose is to visit your friend and not travelling Europe per se, I am not so sure this is a good idea. You might get quite fed up when you get to Varberg. To be blunt, I would never have done it.
I live in Bergen, Norway, and sometimes go the aprox. 300 miles to Oslo with my Roadster. When I arrive, I am always happy that the trip is over, in spite of spectacular scenery.
