KR,
Have been back running since Jan of this year after exactly a 2 year layoff with injury (Plantar Facilitis) which has now completely gone. have built the distance/time on feet up since then and out 3/4 times a week for an hour to 1.5 at mo. Haven't done any speedwork as yet.
Prior to injury my 10k PB was 40:38 but usually times were between 42 and 44 mins with similar training to yourself at that time but I didn't do the long run. My 'Long run' only was about 5 miles - which is probably why I died a lot in 10k races!!
Since Jan have done a 5k race in 22:01 (PB previously was 19:40) which I am happy with as was a very hilly course.
I am training for a half in June and looking at the sub 90. As mentioned above I am building the longer run up and I would say that in the next week or so going to be up around the 12 mile mark.
I think that I am going to ignore speed/tempo training at the mo and concentrate on upping the mileage/long run/time on feet. and throw in a couple of 5k & 10k races for 2 reasons - one to get back into a 'race' feel and the other for the speedwork element.
I beleive by training for the half that later in the year the 10k and 5k PBs should naturally drop - hopefully the elusive 40 min barrier!!