In reply to nicolat: When we were there a few years back we hung out with a couple of French guys who had driven from the south of France. There are places in Sweden where you could stop for an afternoon's climbing to break up the journey as well - and make a bit more of a road trip of it. Calais (well actually if you're not French and living in Calais, but coming from the UK, take the Norfolk Lines ferry to Dunkirk instead, save a few miles) to the Sweden bridge is more of a slog than you might think. Sweden is big but the roads are so much quieter than Denmark and south and somehow the driving is very un-stressful.
I live in Helsinki and have driven to the UK a number of times from there, and also from there up to Lofoten a number of times, so know most of the route you would take. I can suggest some possible climbing stops on the way up if you are interested.