7 Miler done and new land speed personal records set! 
Took the theory of focusing on bite size chunks of each mile (1/4 comfy jog, 1/4 faster, 1/4 comfy, 1/4 faster) and this is what happened...
Mile 1- 2:30, 2:18, 2:39, 2:09 Total 9:36
Mile 2- 2:32, 2:11, 2:45, 2:22 Total 9:50
Mile 3- 2:40, 2:19, 2:40, 2:25 Total 10:04
So thats 29:50 for 3 miles-first time ever under 30 mins!
AVG pace 9:57 
Mile 4-3:24, 2:23, 2:40, 2:30 Total 10:57 (1st section walked for a bit having a drink)
MIle 5- 2:41, 2:27, 2:54, 2:37 Total 10:39
so through 5 miles in 51:26
AVG Pace 10:17 
and then right leg muscles at the back on the top (need to google muscles) started to feel really tight. Probably shock from the speeds so leisurely jogged out remaining two miles. Tiring session but think i'm going to continue with the strategy. It makes you think that every second and every step really does count...