In reply to The New NickB:
>There are lot of people out there with coaching qualifications who will give bad advice (I'm qualified, but I know the limits of my knowledge and would ever give basic advice and always defer to someone like Phil).
That really depends on what the OP is looking for.
Basic pointers on form from someone watching you running. Head, shoulders, arms, hips, knees and ankles, along with cadence and not over-striding. Together with a program of running specific strength training. Lots of running easy and breathing.
Are all extremely simple improvements, don’t require any specialist knowledge, won’t damage you structurally or change anything radically, and are easy to spot and implement.
If the OP has done all that, then it’s time to get more specialised. But I’d suggest 90% of people would make massive improvements with some very simple pointers.
Post edited at 10:48