You're about my size so, like me, you could probably do with dropping about 5kg or so!
Running as hard as that without any training is rather risky. I would find a good training plan for say four days a week with an emphasis on building up endurance. Speed will come later. You're very new to running. Build up slowly.
Llanelli is the most relaxed marathon event I've been to. You can park within 100m of the start line. A two-lap flat course with plenty of interest. I would highly recommend as a first marathon.
Stratford is good too, but I always find traffic to be bad and finding parking hard for this marathon. One of the best finish run-ins I know. There is the matter of the infamous Greenway to cope with, though.
I'll be doing both of these in 2015. If I can find another marathon in March, Stratford will then be my #100.
Regular long runs of 18-22 miles once a fortnight will keep you in marathon shape.
Thanks for the heads up, UDS. I did get your email address from Chimney and was about to email you. You did say ££ at the beginning of Sep, I think, which it will be tomorrow. I will remember the towel.
You haven't been running much then after your supreme efforts in 2013?
jason and others - OK, for potassium eat a banana or use lo-sodium salt (which is high in potassium). Don't meddle with my recipe.
LE - I would say that Devil O' The Highlands is harder than Highland Fling despite being 10 miles shorter. Just about the whole route is over splintered rocks or an 'improved' surface where the rocks are covered with horrible little sharp stones.
Trashed legs is normal. How quickly you recover will determine how fit you're becoming.
Fuel is a bigger issue because you do need some during the marathon distance, unless of course you like out-of-body experiences at the finish line.
Try SIS gels and Go-bars which seem to be tolerable by most.
A timely point to give again for anybody interested my recipe for home-made energy drink:
In a large jug (2L) mix 1L of lemonade, 2 tbsp glucose powder and one heaped tsp salt. Allow to go completely flat then decant into bottles.
I got this recipe from a former 50-mile world record holder who called it 'corpse reviver'. Does a great job and I've never felt nauseous on it yet. I use 500ml for 20 miles, 750ml for a marathon, and 3L for a 100-miler.