I heard an interview with Matt Fitzgerald recently (promoting his book 80/20) in which he said that those who do most of their running at moderate to high effort will increase to a point, then start to get worse. You seem to be an example of this. Run more, with at least 80% of your miles at 8:00 pace or slower. Then you'll start to nail the paces in your quality sessions, recover better, and race faster!
Alehouse, I was talking to Adrian Fuller last night, and there was a delay on Trafford entries going up as they were securing sponsorship and now the person in charge of entries is in Romania. Should go up soon though. Likely to be busy this year as it's some sort of ranking race and they're expecting some top international runners (Non Stanford isn't enough for them!)