A quick word of warning: the Lucozade and Runner's World bands have different time splits!
I've just printed off bands for a 3 hour marathon. According to my calculator, RW give you even splits, but Lucozade do not.
For example, RW have you going through 13 miles at 1:29:18 (precisely 6:52m/m) but for some reason Lucozade want you there in 1:29:03. By the time you've gone through 26 miles, the difference is 2:58:37 vs 2:58:06. Not very useful if it's coming down to the wire!
Maybe the Lucozade ones incorporate some sort of recommended positive split, or maybe someone's just got there maths wrong. Either way, I'd strongly recommend checking the times it gives you.