Bagsy, I have running questions for you.
Considering you think:
Is slow, I feel you are an excellent person to ask.
As you know from my log, I am running again after a 3 year hiatus, and longer before that. My best half marathon time ever was 1h55m on a course that decended 3000ft.
Questions are:
When would you add speed work after getting back into running?
What are some of your favorite speed workouts?
I do not expect to be as fast as you, I am carrying a lot more mass. But getting down to a 21 minute 5k would be fantastic for me. I never cracked 25 minutes even in high school XC.