The Railways and Other Transport Systems (Approval of Works, Plant and Equipment) Regulations 1994

D.  Applications for approval of schemes employing an overhead line system shall additionally be accompanied by documents setting out details of the following:

(a)overbridges indicating the height and protection of bridge parapets;

(b)reduced electrical clearances, with reasons for them;

(c)wire heights along any street and at all level crossings;

(d)protective guards and screens.