Got to admit some of the responses on this thread are hilarious.
Tom, I was in the same boat as you a year ago, except I had even loftier ambitions; take gold in rio, it took me 3-4 months to realise how stupid I sounded and tbh wish I never made that thread. I am running the Great North Run in September and my target is a sub 1:25, deep down I want a 1:20 but I need to run a 5k in around 17 flat within the next 3 months; which is highly unlikely.
I am not the most experienced runner ofc, however over the past year ive done research and talked to some fast runners about what it takes to become even a contender at local races, the advice offered here is sound and you should not ignore it like I did, i'd be suprised if you could run a sub 1:30 in 15 weeks time nevermind a 1:10 (have you changed your goal? I haven't read all the recent posts but I get the impression you have)
Guess its time for an overdue update, I have joined an athletics club, but don't run for them yet; I will do next season(it starts around february time), I train with the senior endurance group so I am the youngest one there, there are a couple of faster runners than me in the group which is good, gives me people to chase down. I have had trouble increasing the mileage because I got injured late february due to my footwear, but i consistently run over 30mpw now, my highest being 54.
I don't race parkruns as much as I used to anymore, infact I haven't raced since early february, this was coming off a 3 week break over Janurary hence why the times weren't even sub 19, it was 19:30 or something which is my fastest time this year. I felt like I was in sub 18 shape before christmas because my workouts indicated that, however I didn't race, can't remember why.
The reason for my absence is because of this thread, I feel embarrassed looking back at my opening post and I hoped people would just forget about my name tbh . I post on runnersworld.com and letsrun regularly, and have a training log on fetcheveryone.