I have signed up to do the London Landmarks half marathon in April. I’m 50, and I started couch25k last March, and I am now running 5/6k 2-3 times a week, and recently on Saturday mornings I’m getting up to 10k plus. My plan is over next 12 weeks is to just keeping adding an extra k to my Saturday morning run. Is that enough? I feel I can do it, ie add an extra k each week. For example this morning I stopped at 10.5 only because I had enough of running in the pouring rain. I’m slow, but that doesn’t bother me, I do sometimes pick up my pace and also add in a horrible hill at least once a week. All I want is to complete it and I think I can do it in 2 hours 15/20. My plan basically is just to keep adding an extra k, and I’m hoping that’s enough?