So I did the final run of week 8 this morning. He 28 min ended in the wrong place - a straight section where the wind blows right through you. So like Thursday I kept running (30:35 then). As the run had started hard and got easier, I just kept running until I got the full 5k (in 35 min), which is what I was going to try next Saturday.
The run ended well, and bring on week 9!