I don't see any primary line (72kv) on that pole only secondaries(220v) along with telephone/cable. BC Hydro doesn't usually trim around secondaries, rather concentrate on the primaries. In my experience, Telus(telephone) and Shaw(cable) don't care about the line maintenance until the line gets damaged.
I get the impression you and your neighbour don't get along. So, if I was in your position, there would be no way he's climbing my tree. If he was to fall and get hurt on your property, although we Canucks aren't as litigious as our neighbours to the south, who knows what he would do.