Recoveries: 120 Secs for the 12 mins, 60 Seconds for the 1 min reps.
A really good session to do as a group the week in the lead up to a half marathon. It gives you an opportunity to run a few miles at goal pace and also get some speed in the legs. Be sure to stick to HM pace though, any quicker and it defies the object of the session and you will be tired on race day.