In message , Dr John Stockton
writes
During a brief period of working in Cambridge some years ago I had the
same privilege, going from the Eastern to Western hemispheres every
morning!

You can't have worked in Cambridge then! The meridian passes some miles
West of Cambridge.

Cannot one commute in from Orwell or Toft - or Birmingham or London?

Yes, but with a daytime job that would be from Western to Eastern
Hemisphere every morning ...

(Don't ever underestimate how pedant some Cambridge people are!!)
--
Roland Perry