After recently graduating I've been running with the help of Map my run (thanks to advice from here).
I am an incredibly slow runner. On Saturday I ran for 30 minutes and did a pace of 10 minutes 55 seconds per km.
Yesterday I ran for the first time without Laura using Map My Run telling me my distance/pace/split every 5 minutes. I listened to Take That in concert (don't judge!). My pace was 10 minutes 18 seconds per km.
So I improved by 37 seconds per km.