Distance by Sea?

Yup, about that. Bit less if you go close around Portland Bill and St Albans head, but its only a few miles difference...
 
I've just run it through my Memory Map with proper charts and surprisingly it is 95 miles if you keep very close in at Portland and only a couple of miles longer (97 miles) if you keep 7 miles south of the "Old Bill".
Not taking tides into consideration of course.
 
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