Evie May - Up and Running is the only shop I know of that does it in NI. A podiatrist could tell you if you over pronate but I'd just use it as an excuse to spend the day shopping in Belfast
Good luck to everyone doing Dublin. I have to give a special good luck to Davy -you're put in so much hard work so just relax and enjoy it.
Evie May - I remember when 5 min on the treadmill used to kill me but a few years later I was able to run for 6 and a half hours in the Mournes. You will amaze yourself with what you can do if you just stick with it.
Robin - it's designed for plantar fasciitis. The one I got attaches your shin to your foot to keep the foot flexed. There are other models which look like a ski boot but they were quite expensive and looked v uncomfortable!