Do you have a favourite/nightmare place to ride in London?

dogsballs oooh ohhhhh, hippy will back me, the underpass on marylebone high st, particularly when it's jammed solid and you can absolutely smoke it through the traffic without fear of numpty peds stepping out!!!

Nup, don't know what you're talking about. Do you mean the Euston underpass on Euston Rd?
http://www.bbc.co.uk/london/content/webcams/547361.shtml
Map

If that's what you really meant then I'm totally with you! 50-60kph down through there and 90% of the time without trouble from anything. Sometimes a scooter blocks the middle 'lane' but mostly its HAMMER TIME.