TFL's London Cycle Challenge

How it works
The Cycle Challenge is a competition to see which team can cycle the most miles in a month. Teams that come top win great prizes.

You'll get points for the miles you cycle with extra points for your first miles.

0 – 10 miles = 5 points
11 -20 miles = 2 points
20 + miles = 1 point

I suspect they really mean:
5 points per ride, plus 1 point for every 10 complete miles in the ride, plus an extra 1 point for rides longer than 10 miles.

But either way, it looks like lots of short rides is the way to win points most efficiently.