Notes
Good hard tourist run. There were way more stop and go's than I've ever had a on run based on where I was running and also being lost.
Went south from hotel to river, east past big ben, then backtracked a bit and cut up to find the parks. I spent some time lost in this area but eventually found hyde park corner and did laps around the two parks.
Lesson: don't run near big ben and buckingham palace at noon on a saturday.
My effort was great, I wasn't really pushing hard until the end when my pace was dropping to low 7s and even well under 7 for some stretches. Most of this run was medium, but calling it a hard based on final feeling.