I use that route everyday.
The only consideration, when travelling toward London is to a) watch out for the road surface as it's a bit 'wavy' b) remember that a lot of the traffic is going to turn left - without necessarily signalling, so position yourself on the outside line of any vehicle in front of you...ready to move across when the vehicle moves, either straight on or left c) be absolutely sure what the traffic in the 'outside' lane is doing and
expect a sudden swerve into the lesser populated inside lane...from anyone - not just a black car woman etc. It's your lane at that point and I think the expression is 'strong primary'...very strong. As the road crosses the junction, it's ok to keep to the left and let the 'starting grid rush' depart, but there is a bus stop shortly after and once again, shift smoothly to 'a bus width' or so from the kerb (road is bad around there too) - this will help a bit further along where cars are parked (police cars often!) for the café et seq to the next junction where you employ your extra set of eyes at the junction of Sheaveshill Avenue, where turning traffic doesn't much care about cyclists unless you're really in their face - in the nicest possible way, before continuing along the bombed-out bit of road toward the next set of lights at Kingsbury Rd etc - where there will always be some plank blocking your way to the bus lane...trying to filter without a hope, into the morass of impatients.
It's more or less a defensive yet fairly safe ride, providing your eyes and ears are helping you anticipate. Only one other dangerous bit comes to mind, and that is the turn off at Garrick Road, before the rise to West Hendon. Turning traffic and stuff coming down the outside lane tries to cut across and turn. Don't let it - stay strong to the centre/outside of the lane if you are going straight ahead.
