Hi,
I am a new member of this site, i too am also aiming for a sub 3hr marathon in Abingdon in Oct. ( like ardvark) However i am no where near 100m a week. At the moe i am at 48miles a week, with the long runs at 2hrs for 16miles. I am also doing one speed session aweek, one hills, and one pace. Do any of you think this is not enough? i am in my 8th week of dedicated marathon training. Your advice would be greatly received. cheers.