I'm sure I'd class the journey by bus because the reference to the necessary and proportionally tiny boat or eurotunnel crossing would be seen as obvious, unnecessary and annoying.
- not at all! i went by foot, took a bus, went by foot, took a train, went by foot, took an elevator, went by foot, took the plane, went by foot, took a taxi, and then by foot
- did you come by plane?
- not at all! i went by foot, took a bus, went by foot, took a train, went by foot, took an elevator, went by foot, took the plane, went by foot, took a taxi, and then by foot
- al..right