Hi Alan, do you stretch after running? I found that can make a big difference to recovery. Theres any amount of advice on t'interweb about which ones to do.
As far as the jacket goes, wait a bit and if the weather looks like being decent enough that you won't actually have to wear one, hows about one of those cheap 'pacamac' type jackets form Yeomans or Milletts or somewhere, until you can afford a half decent one? Mind you, winter isn't far off...
By the way, does the atomic DT have a hood that stows away? I cant be doing with them flapping about, but I was thinking of that jacket for running?