I haven't any expert advice but I'd like to offer some encouragement since it sounds like you have had similar experiences to me. I have previously had a number of marathons with times of 3:16, 3:18 etc and last year ran a disappointing 3:28 (sore throat etc 2 weeks before!). However, this year it came right with an unexpected 3:04. I just put it down to the many factors being right on the day for me.As David says, your training performance shows that you should be able to do 3:15 if not better so don't worry. I'd generally go along with what David suggests but personally I'd go easy on the speed in the last week.I suspect that the combination of poor start, your minor injury, enforced premature taper and how you were feeling got the better of you this time. I'm sure if you persist you'll do it - just keep trying - good luck.PSI use the power gels (4 off) with plenty of water (I don't touch the feed station stuff). They seem to deliver the energy without the Stomach problems! I'm not sure you get much from jelly babies (unless you eat loads of them!).BTW which start were you on? I was on the blue in pen 3 and managed 7:44 for mile 1.