Hello all, hoping for a bit of advice. We have new neighbours on the southside at a row of Victorian terraces. Our long and narrow gardens face west. The terrace is old, and it is unclear who the fence between the properties belongs to, although we mended parts of it (and fully paid for it) last summer before the new owners moved in. The new owners have applied for lots of bits of planning permission, including an extension some front garden work, as well as noting that they want to raise the brick wall in the garden to 2 metres. It currently stands just under 120cm. Our problem is that the lower ground floor is sunk so it's half underground (and the ground floor is elevated) and the tiny bit of light that comes through in the afternoon to that west-facing corner of the lower ground might be blocked by the high wall. I've tried talking to the neighbours about it nicely but they are very insulated and borderline morose, so it's been a challenge. I don't actually have huge objections to the wall being higher, but I would like to understand (and I would like them to get someone to explore this) how much the higher wall will affect light coming in.
If the council has given planning permission to a higher fence, is there anything we can do? I would have thought they would need to seek some approval from us if our house is negatively impacted.