C2S details...

the stats:
start temp/humidity: 10.6/32% (rising to 12.4/52%)
start time: 9:06am
total distance: 14:17
total time: 72:50
avg pace: 5:08
total calories: 1101
avg HR*: 166

*Time spent in HR Zones:
00:00 [Z1: 93-111]
00:00 [Z2: 111-130]
02:38 [Z3: 130-148]
49:30 [Z4: 148-167]
16:39 [Z5: 167-185]

1k splits: 5:55, 5:18, 5:27, 5:15, 4:55, 5:01, 5:54, 5:25, 4:58, 5:01, 5:10, 4:44, 4:28, 4:39, 0:32

my time may be closer to 72:37 as I pressed start early! in fact 72:37 is correct!

big negative split: 37:49 / 35:01

reached 10k in 53:14 so 19:36 to finish...

on a sad note, didn't realise someone had died near the finish until I saw the news...