Hi there, I am doing london in three weeks. I have been following the runners world 3.45 programme and have followed it down to the T! I did fleet half marathon last weekend in 1.41 average pace 7.43 per mile. And yesterday did 22 miles in 3.10 which averaged 8.38 per mile. I felt pretty comfortable for this. I am desperate to get sub 4 hrs at london and ideally would love sub 3.45 just wondering what is realistic and what sort of pace people would suggest I go for? I know it depends on variations like weather, how I feel on the day etc. I am conscious of not starting out too fast and would rather wind it up later if i'm feeling strong. Most of my runs I have been doing negative splits so used to this. Any ideas/help would be appreciated!