Thanks for the comments, folks.
Dash - yep - that's why I'm here! Curly - Cheers. Was acutely aware that I was probably strong arming my way in here a bit early, but could see that there's plenty, yourself included, who had taken the journey I want to take myself to getting themselves faster through smarter running. Really grateful for the time you've all taken to steer me so far, and whilst I was itching to hit some harder miles over the last 2/3 weeks, the worth of keeping a lid on it was proven yesterday, as I got to the start line not only in one piece, but chomping at the bit with fresh legs.
Congrats also to those with good races this weekend, Wardi, YP and T'Other Man and well done to Kelly for sticking it out. Some good training as usual as well, though Phil's starting to annoy me with his ability to burn the candle at both ends! Necking several of my favourite beers, and then nonchalantly shrugging them off by sticking in 21 swift training miles! 
So, race report - was too knackered last night - I now know what 'race beat' means.
Had a Garmin disaster at the start as I bumped into one of the lads from our cricket club who is a keen runner, and had to go through the 'what the feck are you doing here?!' routine with him and explained that I'd just got into it. While we were gassing, the Garmin that I'd put into training mode, switched back to sleep mode, only realising as the gun went off, and was then fumbling with unlocking the bezel, re-entering training mode and so on as I jogged the first couple of hundred yards. 
That had let plenty of duffers past me, so ended up in a bit of a bottleneck, and once the watch was going and I was passing them again, realised I was doing some suicidal, crazy sheeeeet sub 7-minute mile pace, only slowing enough to complete the first (Garmin) clocked mile in 7.03. Too fast! But felt quite comfortable all the same.
Then got myself into a rhythm with a steady group of runners in club shirts - thought they'd be reasonable to tuck in with and so it proved, knocking out both miles 2 and 3 at 7:26 pace. Still quicker than I'd planned, but not too crazy, and still feeling pretty good. The next couple of miles did slow (7:33 and 7:34) with a bit of a climb in mile 5 hurting me and it was tough from there on, but given the earlier miles knew I was well on course for my target or better.
The group I was in then began to run out of steam, and I'd noticed a guy who had been consistently narrowly beating me at parkrun come past me at about the 4 mile mark. As he'd hitched a ride on me for at least half of one of those parkruns, and had beaten me by a second that day, I decided it was time to turn the tables, so left the group I was running with behind, caught up with him and let him do the work this time.
Was tough keeping it going by now, but with Dash's 'embrace the hurt, embrace the hurt' mantra repeating round my noggin, that 6th mile saw an acceleration to 7:11 pace! Although it was difficult to think straight at this point, I think I realised that sub-46 was on the cards, and internal 'embrace the hurt' was replaced with several repetitions of 'COME ON!' under my breath...or so I thought until someone turned round to look at me! 
Rounding the final corner and on to a grassy straight to the line, I was still on that bugger from parkrun's shoulder, summoned up the last of my energy, and hit the gas - was amazed to find just how much there was.
Continues...
Edited: 04/03/2013 at 14:07