So I ran a steadyish quick tempo instead - route above. Started fairly quick at 4:03s then slowed down loads going along Wood St and through Manly Cove and up the hill to North Head. Reached 6km in 26:20. Ran the Striders marked 2km of North Head quickly (3:26 and 3:20) into a headwind and then contined on with the quicker pace - albeit into a headwind all the way along Manly Beach. Aim then was to get back home averaging under 4:00mins per km which I just did - 15.67km in 1:02:25 (3:59s).
Nice run on a beautiful day but worried about ever having the balls to do a speed session by myself again.
Good luck to Kanser in Berlin tomorrow. He's capable of smashing 2:40 and running sub 2:38.