KK - I came back from injury in Spring and started with 6 mpw in June, so mileage was lower than it should be for my Abingdon campaign. In total I averaged 38 mpw inc 5 longest runs = 99 miles. Achieved sub 3.10, However I don't think it is simply a case of saying do X mileage per week and you will run X time.
MM - Congratulations on the highest weekly mileage week I have seen on this thread for quite sometime.
Why on the earth would you want to use the fitness from that sort of mileage to run a marathon?
SBD - Sounds like you are all motivated and excited to start the campaign then 
Neil - Snow in southern Kent all gone (apart from very few hidden patches). North Kent still has snow on fields but roads all open. This week is meant to be cold again though. Whereabouts in Kent will you be returning to? If you join in the 10k there will be 3 of us requiring post event pints. 
Like you Lorenzo, I hit the North Downs way today. Planned to do 18m, BarryB style (no food, gels, water, just breakfast as fuel). Not too worried about pace as I wanted to go up and down a few hills. In fact did quite a bit cross fields and through woods, as the mood took me. Remembered to lube up my nips and lips but forgot my tackle. Not normally a problem but the black pats I had on I thought were the running tight friendly version, but turned out to be the ones that look like running tight friendly, but certainly are not. A quick lower half strip tease in the woods removed them and commando running was totally fine. 
Approaching home I realised the run was going to be closer to 19 miles, so took a loop to extend it to 20m in 2hr 39 mins (at least that what the watch said) However Sportstracks lowered that to 19.88 miles
A good progressive run with 5m split pace of 8.21 / 8.09 / 7.55 / 7.37.
If I am working on sub 3 as a target (6.52 M Pace) are LSRs @ 8.01 pace to fast?
Would love a bath. When I got home my wife was tearing her hair out with my youngest who has hit the terrible 2s. I've just spent 2 hrs in the garden and at the playground. Bob the Builder is currently carmly the situation temporarily 