All the advice has been to continue with 3 x 30min runs until I can comfortably manage 5k ( I'm doing my first ever race on 3rd Oct).
So I got the kit on after work and hit the road, with full intention of doing 30mins, and no more. But when I got to 30mins, I found that I had covered 3.9k, which is more than I've done before, and a little voice said "Go on- you can do 4k'. So I did!! It only took another minute or so, and I was thrilled to find I still had something left in the tank.
(A little hysterical 😃)