There is a more modest wall in Newcastle: https://en.wikipedia.org/wiki/Byker_Wall https://en.wikipedia.org/wiki/Byker_Wall I just measured it on Google Maps

There is a more modest wall in Newcastle: https://en.wikipedia.org/wiki/Byker_Wall https://en.wikipedia.org/wiki/Byker_Wall I just measured it on Google Maps as 979 metres long (the Fermont Wall is 1.3 km). Also, i don't think it has continuous internal corridors and extensive commercial space, as Fermont does. It's just an unusually long block of flats. I'm also not sure it's continuous - i think there might be breaks around the swimming pool building. What the two walls have in common is that they were built to protect an enclosed area from an external hazard - in Fermont, it was the wind, but in Byker, it was noise from a proposed motorway which would have run round the estate.