Grand Union canal routes

I used this route to get to Gunnersbury recently. From Camden and around Regent's park is quick, but then before you get to the Little Venice tunnel, there's a long section of canal boat moorings where cycling isn't possible (the water supplies/electric hookups cross the path and have been built up to bottom bracket height) Each one was marked with a 'no cycling' sign and I have heard that this stretch is designated as non-cycling officially. You have to briefly leave the canal here, after going up the steps to go over the tunnel, however it's pretty easy to find the water again. The canal remains forbidden to cyclists until just past Little Venice basin, so you cross the bridge and then turn right, there's a cycle path parallel to the canal at first which merges with the canal path a little later. From there it is a direct blam as far as you want to go, although there are some abrupt steep sections a bit before you get near Wormwood Scrubs. Altogether it's a nice ride, although if I'd known about the mooring area on the Camden>Little Venice section, I'd have considered coming off the canal before then.