Hello and thanks for the reply. Right then, a bit more info:
Food intake is pretty good I think. I've been eating enough (I think), and my diet is generally very good so I'm fine re that I believe. I use SIS drinks and gels on my runs and seem fine energy-wise - it's just my legs (hamstrings and glutes) that hurt like hell, and just don't want to work!
Rest days - this may part of the problem! Usually 2 per week, but I've had a tendency to go out for a very steady 4 or 5 miler on one of them.
My training shedule is hard yes - I got it off Smart Coach on here, and I selected the 'Hard' option which in hindsight was a bit daft. I was thinking if I trained hard and then tapered off I'd be able to do the marathon ok. Having said that I've found the runs to be ok and I do feel fine in myself (not tired or anything really) - it's just my legs that are struggling, and only in this last week or so. Being honest I've done some of my easy runs at too quick a pace too.
Yes it's my first marathon. I've not done any actual races for a while, but I do run a lot as a matter of course. I only used to run for say an hour though at a fast pace (fast for me!) - so the change in pace/distance has taken some adjustments, but I thought I'd got it ok really (I've been on a slower but longer plan since before Xmas really). I have ran 4 half-marathons previously too, but none for a couple of years.
Planned marathon pace is circa 8'40ish to 9'00 miles. Many of my previous long runs were too quick too - not much slower than marathon pace. Yesterday I was running at about 10'00 per mile, but that slowed dramatically to nearer 12'00 for the last 2 miles or so.
In my view I think I've ran my long runs too quick (i.e. - often pretty much at anticipated marathon pace) and I've not left enough rest/recovery between long runs. It's just what to do now that concerns me - I've still only done 1 x 19 miler - ideally I'd like to get another 2 in before the race, but I'm unsure if it will be counter-productive bearing in mind how my legs are at present.
Sorry for the long post - just trying to give as much info as poss! Cheers