Novice Runner - Training / Shoes advice

[Robw73]

A quick background.

I started running again in March after approx 15 years of very little physical activity.
I've gone from zero to regularly doing 7kms to 8kms runs 2 or 3 times a week.
I'm pleased with progress as I was hampered for 6 weeks with an injury.
My aim is 10kms. I've managed this once!

I'm seeking advice really.
What is the most effective way of building fitness / stamina?
Is it simply just to keep getting out there?

Also, I don't have a huge amount of spare cash!
At the moment i'm plodding around in pretty crap trainers.
Can anyone recommend a decent pair of running shoes (little country tracks or road) for a budget of about £80?

Any help will be greatly appreciated.

Thank you

Edited by Robw73 on Tuesday 1st September 18:53