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For completeness, french motorway tolls from Geneva to Calais will most probably cost more than the tunnel itself. I think the only toll in the UK would be Dartford which is negligible and can be avoided by circling London on the South (Folkestone to M1 is roughly the same time regardless of what direction you choose in the M25).
@DavidSupportsMonica It seems like it is more a US thing; cars in Europe all have the indicators on the left stalk so this issue shouldn't affect someone driving from France to the UK.
@DavidSupportsMonica I've done a little digging. It seems like the difference is due to where the car was built and not what side the steering wheel is in. worldstandards.eu/cars/trivia-about-driving-left
@phoog The Swiss-Italian bilateral agreement specifies the three bordering cantons (Valais, Ticino and The Grisons) on the Swiss side and a place of residence at most 20Km from the border on the Italian side. It is from 1972, long before the common market, so I guess each bordering country will have different rules depending on what was negotiated at the time.
Those depend on each bilateral agreement. I would expect bordering Cantons (that's how it works with Italy) but without seeing the agreement with the other countries I can't be certain.
Thanks for the offer, but that's not how Stackexchange works; this is a questions and answers dite, not a forum. (Besides, my original question was six years ago). Having said that, I would advice you to keep your car. We discovered that it was much easier to learn to drive on the "wrong" side when at least you are familiar with the car, instead of having to learn both the roads and the car layout.
