I'm training for the Sheffield Half-Mara on the 8th May,(my first half-mara) and I've run a few 10 mile training runs (every week), which are going well, and I'll increase this distance now. I'm also running a couple of 4 / 5 miles a week.
The thing is I have a couple of weeks off work, and therefore have a bit more time for training. Would it make sense to do an extra long run a week for a couple of weeks? If not, what would be useful additional training, if any?