John - I thought you did really well to get round, was only pointing out your time as normally folk take off a few minutes here and there, not add it on. Well done for everything you did. Don't go beating yourself up - the written word on a forum like this can take on a different meaning than if you'd just asked the question to a bunch of say runners. Keep up the good work for your lad.
John - you did it in 6.35, not 'nearly 7 hours'. Beside the toilet issue, well done on raising the funds, and some happy (or relieved?) photos of you going over that finish line and along the course for that matter!
She said on the one show that she had to seek medical attention about mile 7, as a blister on the sole of her foot had burst and her foot was wet through and slipping (presumably in the shoes). A rather graphic description for those of us eating at the time, yuk.
Using that link above to photos - in the bit at the bottom where it says 'could these also be you', the one at the end of the first row looks to be of her at the finish line? Could be wrong, but that bloke is also the same as in some of the other photos. Think a couple of the others could be of her also veering off to the side, but difficult to see.