Warm up/down 10:00 
Plenty of stretching. Knee felt.. maybe stiff but did get more comfortable after stretching
Running 20:00  3.43 km (5:50 / km) +30m 5:35 / km
I was very conscious of the left knee but it was feeling quite good really.
There were two or three times towards the end where it got a small sharp pain, possibly just a little twist or somethings.
Stretched after. Now at home icing, want this to be good ASAP!