Success!
A new PB at 21:30 for 5km
500m splits
1:50
2:02
2:06
2:14
2:06
10:20 at halfway turnaround
2:14
2:10
2:32
2:19
1:56
11:10 for second half

So it looks like i faded in the second half....probably went out to fast to start with and had a few walk breaks coming home.
Oh well its still a Pb and i can learn from it to improve!

Cheers R2B