ps what's the modern term for "manhole"? I use it here because everyone will know what I mean, but I accept there are women engineers too. "Access chamber" doesn't sound right!
Until such time as Black Sheep utters the correct phrases, I shall make mention of Joint Box, Footway (JBF) and Joint Box, Carriageway (JBC).
I have a substantial amount of BT cable ducting buried under my garden, with a couple of access points. The Wayleave agreement refers only to 'underground cabling' and 'joint boxes'.