Coming back from a few months out I did 8 weeks averaging 25 mpw, longest week was 35 miles, then did a big jump up to an average of 50 miles for 4 weeks. Nothing specific just logging miles, mainly off road and in the hills plus a few short races both on and off road.
Then on a whim I ran a 20.2 miles trail run and decided I would do a marathon. (I'm calling this week 1) So I picked my race (Wolverhampton) and now had 8 weeks to train for it.
Week 1: 56.8 miles - long run 20.2 - race 5k.
Week 2: 56.2 miles - long run 20.4 - race 5k & 5 mile.
Week 3: 53.7 miles - long run 11.8 - race 10 mile.
Week 4: 57.5 miles - long run 22.7 - race 5k & 10k
Week 5: 65.1miles - long run 24.2 - race 5 & 10 miles.
Week 6: 43.7 miles - long run 19* - race 4 mile.
Week 7: 35.0 miles - long run 9.6.
Week 8: 39.9 miles - long run 13.1.
Week 9: 34.2 miles - long run and race 26.2 miles!
The 19* miles was done at predicted marathon race paced based on my times in my previous races. The following day I did a 4 mile race and basically knackered myself and was forced to taper/rest 3 1/2 weeks out, which I think was a actaully a good thing. All my other long runs where done slowly, upto 3 minutes a mile slower (24.2 miles in 4 hrs = 9.55 m/m, it was hilly and off road)
I based my training very roughly on a Frank Horwill plan .
My long runs where the"time on your feet" runs.
I did 2 "build up to 18 miles at race pace" one at 14 miles and the 19* miler. (No real build up there)
The quality was taken care of by racing.
And all my other runs were the recovery runs.
My races predicted a finish time of anything between 2:51 and 2:58. Wolverhampton is not a hilly course but it's far from flat, I thought I could do 2:55 on a flat course so was looking for 2:58 (anything under 3 hours would've done). On the day I did 2:55:55.
Good luck and good training Adrian.