To further illustrate that, I've just taken nearly a minute off my 5km PB (22:49 before, 21:57 today) when I was just out to stretch my legs properly.
I do feel tempted to try a Park Run for the first time, as the route for this run includes crossing the A27 twice which, at school rush hour, is quite hazardous - and I was quite close to getting knocked down on my second crossing! I imagine when I don't have these obstacles and have the incentive of other runners to chase, I've got at least another 30 seconds in me.
Splits were all over the place a bit at: 7:04 - 6:58 - 7:13 - 7:02,
I wouldn't say those were all over the place, they're really quite consistant (for comparison mine on Saturday were 7.21 - 7.12 - 7.09 - 6.27 but I was running to a plan of sticking with a pacer and then taking off). Yours are more consistant than that, mine are more "negative".
I'd defintely say do a parkrun. Worthing Prom is nice and flat and you'll crush that time with a bit of race adrenaline. Might even beat [MENTION=33116]Garry Nelson's teacher[/MENTION]