Thanks to the advice on here and me learning to be more patient, I am back running again, with no injuries.
I have focused on duration of run rather than speed or distance as that worked for me with C25K. I started with a slow 20 min walk jog and have gradually increaes the duration of the run. This morning I aimed for a 50 min run and managed to complete just over 4k, so a slow 8min/k. It does feel good to be able to get out there and enjoy a run without any pain or niggles.