Good point, I had overlooked that one!
So I would assume there is no danger, aside from a tripping hazard or if there is a train coming (which I have also generally noticed you can tell from the noise made by what I gather is resonance in the lines)?
To add to the last post.
The Return Conductor (RC) system where fitted is continuous along the length of the OHL and is connected to the Neutral busbar at the TSC/FS.
Booster transformers (which are 1:1 voltage equalising transformers) are located approximately every 2 to 3 miles. The primary windings of these are connected directly to the Catenary wire of the OHL. The secondary windings are connected to the RC such that the RC passes through them.
When a train enters the OHL section, the primary windings are energised. Because the transformer is an equalising transformer the secondary windings will attempt to equalise themselves with the voltage in the primaries. The effect of this is to make the RC system turn into agiant electrical vacuum cleaner, in which any stray current is drawn up into the RC system from the rails. This is achieved by what are known as Mid-Point Connections (MPCs), known by non-OHL staff as Red Bonds. These bonds which are actually coloured red are connected directly from the rail to the RC will be livened up when there is a train in the section, and current passing through them is sufficient to give a nasty belt. In the right (or wrong) circumstances this current will be dangerous to life.
MPCs are therefore extremely dangerous and should never be approached and very definitely never ever touched or interfered with.
Additional bonds known as Transposition Bonds and coloured yellow form the connections when the Traction Return rail changes from one side to the other. Like Red Bonds they can be dangerous to life if the cross-track bonding is disturbed. They can, and will, however give a nasty belt if touched.
On electrified lines at specific locations, all Traction Return rails are connected to one another by what are known as Cross-Track bonds (coloured black). These are installed to ensure that there is always an alternative path to the TSC/FS should any bonding along a track become disconnected.
Broken rails within the Traction Return system are also highly dangerous and should never be bridged until the OHL staff have attended and earthed out the RC round them.
All OHL Structures and metallic/conductive structures inside and alongside OHL Equipped lines are also bonded directly to the Traction Return system, except for S&T location cases, which are earthed separately.
It should be noted that it is not a good idea to "pass water" against an OHL Structure as these do become energised through EMI when the OHL Equipment is live, and if the earthing is inadequate or there is a heavy flow of traction current, one can find that one becomes the earth to the TSC/FS !
incandescence .