Hi,
The canal locations are at Dobson Lock close to Apperley Bridge
You can park on Apperly road close to Milman swing bridge.
Follow the canal towards Shipley
Between Bottom Farm and Idle Swing bridge (Filmed on the opposite side of the canal, undeneath the pylon and railway bridge) is one of the locations
Next to Buck Mill Swing bridge follow the path over the bridge. you can see the House to your left.
not much to see really you can't get that close. The foot path leads up to a wider track where Ron riding down on his motorbike meets Dora in the episode
Alternatively, you can drive there, Follow the A657 towards Shipley to Thackley Road on the right, down to Buck mill lane.
Buck mill lane is just a track you can probably park on Thackley Rd. then walk down taking the track through the gate.
Hope this helps
Johno