TR38 - I'm not going to make a descion on next year until the new year as now , when I'm going through post race blues, is not the right time. Also if I hadn't run all the way, albeit very slowly, I'd definately say yes now as for me doing a marathon means running all the way and that's what I would want to do.
On that point I think it really helps doing the walk up hills method. I ran all the way up the last hill and only ended up about 100meters infront of those walking, and then refreshed they ran past me.
If I'm perfectly honest I think I will almost definately do it as I think/know I can get well under 4:30.
I honestly thought before the race it would be my first and last, and it still maybe, but I doubt it.
If you'd asked me in the last 4 miles on Saturday you would have got a most emphatic NO WAY.