around 8 hours
about an hour-there are several airports in the UK/France so north UK to south France takes twice as long as say London to Paris.
don't sail, fly
It takes two hours from the UK to France.
Around a fortnight depending on the vessel.
5 months and a half
No it is east of UK north of France south of the Netherlands and west of Germany
France
about an hour
2 hours
8hours
Your question is like asking 'which nation is south of Washington DC'. The nation that is immediatly south of the UK is France.