I'm in South Ribble too! I can recommend Foot Traffic in Bolton for shoe fitting, its a small shop and the staff are runners (I was a bit intimidated when I went in but they were really helpful), I was having problems with my calves and achilles due to having the wrong shoes, they put me on a treadmill trying on loads of shoes and videoing my gait until I found the correct ones, my calf problems haven't returned. They also sorted my friend out who was constantly having problems with shin splints, she's now running regularly pain free.
Just an update, my chiro pinpointed my groin pain as orginating from my pubic bone rather than hip. He thinks its inflamed and I have to try to ice it (weird) and to continue anti-inflammatories. I can now at least walk properly but a search on pubic bone inflammation on this site does worry me a bit.