It's perfectly natural to be nervous about running double the distance, but I'd say that if you're running a half in just over 1:20 then your a more than decent standard! To get to where you are over 13.1 I assume you've been able to sensibly schedule your running, so with the right advice stepping your training up to marathon racing shouldn't be a problem.
One piece of advice would be to join a club if you're not already a member of one, and see if there is anyone who is around your ability level for the half who has experience of moving up to a marathon, and pick their brains and possibly train with them. Most clubs also have qualified coaches who'll be able to give you advice as your training progresses, which would be much more valuable than reading an online training schedule or snippets of advice.
Above all, enjoy it - marathons are a great experience, and I reckon you'll do a great time at Edinburgh next year - all the very best with you training over the next six months.
I've been subscribing for quite a number of years, and will continue, as I find that whilst some of the articles within the magazine are repetitive, re-reading them reinforces some of the stuff I know I should be doing but through laziness / forgetfulness I'm not.
The Warm Ups section always seems to have something in there that I should be adhering to, and taking the example of the August issue the articles 'Beyond the mantra' on positive thinking, 'Outrun Time' on running in older age, the carbohydrate argument and elite advice were all good thought provoking reads.
However, to counterbalance my positive feedback, here's the constructive:
1. Please do your research better. For example in the heroes of running section you stated that Adam Gemili played for 'Non League Dagenham and Redbridge' in January 2012 - that season the Daggers were in League Two. It's little bits of lazy journalism like this that annoy me!
2. As others have said, some more real-life stories / experiences would be interesting. The US version of your magazine (Which you seem to copy - more on that in 3!) gets it right - they have a big story once a month that covers about 8-9 pages and is always an interesting read.
3. From coming back from America and buying their version of Runner's World, I've noticed that quite a few articles from the US turn up in the UK version a month or two later - whilst I don't mind this, occasionally they're written for the American reader in mind - this doesn't bother me, but may bother others.
In summary, a great read, but please listen to some of the feedback from people on here, or you may lose more subscribers. Right, off for my long run...
4th July in America is a great day - I was lucky to be in New York 3 years ago, and went to see a baseball game at the Yankee Stadium, and then watched the fireworks in the evening.
Was in Boston this year for Memorial Day, which was much more moving. Had the privilege to run their Run To Remember half marathon, which is to raise money for fallen police and armed forces members, which took on extra meaning after the events during and after the marathon - a truly moving event in itself.
But I can see Pashy's point - in years gone by running shoes were a decent cost, in that you could get a pair of £50. I know inflation has meant prices of everything goes up, but for example £130-£140 for the new Nike Flyknit range is excessive, especially when they're branded as being minimalist!!
I was musing with someone at work the other day about the day-to-day cost of running, taking into consideration shoes, clothes, nutrition, race entry fees etc, and whilst it may come out a fair whack of cash, I doubt it's anywhere near the likes of cycling or golf where the big items likes bikes and clubs can cost a fortune.