Thanks very much for your response. I'm 37 now, but use to run in my mid teens, and did a 5k about 4 years ago. I'm going to the gym twice a week and have been for 6 months so am fairly fit. i was diagnosed 1 yr ago.
I have bought new trainers based on my running stance/foot. so will brake them in soon. The run isn't till May, and i'm seeing my pd nurse early Jan, so will discuss my training with her.
I'm just looking online now for a good training plan, so that, as you say i have a comfortable run. I want to enjoy it as well as cross the finishing line
Thanks again for your advice. i'll keep you posted on the progress.