rskedgell
Mapillary imagery suggests that there is a path up from the towpath to the south of the bridge and the pipeline.
https://www.mapillary.com/app/?lat=52.012293906667&lng=-0.71594470166667&z=17&pKey=936228460506799&focus=photo&x=0.6555171107502487&y=0.4993685644061531&zoom=1.0528963061602594