errr.. you aren't supposed to cycle through the Limehouse Link?!
East India Dock Rd / Commercial Rd is ok though. It mostly depends on which Lea crossing I use as to where I end up.
I did once accidentally do the Limehouse Link on my bike - it wasn't too bad, as the traffic was nose to tail and rolling at about 10mph. Last night I simply missed the CS3 turning as I came south down Butcher Row, and suddenly there I was at the mouth of the tunnel.
Yes, utterly bizarre. Met cs3 for the first time this evening. Good alternative to the Limehouse tunnel but it does require concentration.