Hi Olawumi Lanlehin,
Have you figured out the problem with London road network?
Currently, I am doing my dissertation and I need to run a network analysis (Closest facilities) on London roads. I have a similar problem as yours and was looking through websites and blogs to find a solution which I came across to the discussion that you've started.
I just was wondering whether you might be to help me now. Many thanks in advance.
looking forward to hearing from you.
Regards
Shohreh