I completed week 5 on 28th Feb and after chatting with a colleage at work (who completed the c25k a few months ago and has lost 4 stone!!) who runs in a 5k timed run at our local park.
To be honest, were I able to do that at your stage of the C25k, I wouldn't bother with the rest of the programme. All I would say is be careful with regard to injury as stepping it up too much can be a problem but a sub 30 5k and only three quarters down the field suggests to me that you'd be wasting your time.
Blimey! That's fast! - and in week 6... You must be young, I think! And/or very fit!
I don't see any reason not to carry on with the programme though, if you like the structure of it, especially if you've picked up some aches and pains (though maybe a bit of a rest first would be a good idea!) But as Fingalo says, maybe you don't need it. What's your next target?!
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