Colin Rosenstiel wrote:
An Anglia Day Ranger would be cheaper at a tenner each way.

A Cambridge-London SDS is 17.90GBP (CDS 17.50GBP), and a
Cambridge-Norwich SVR is only 16.70

So you only need to spend 17.50 + 16.70 = 34.20GBP (A saving of
31.80 off the London-Norwich SOR!)

Or less.

Except that we discovered the Day Ranger is now eleven quid. The Saver
is better if he's staying the night in Norwich.