Closed nelsonic closed 5 years ago
https://www.whitesales.co.uk/products/smoke-vents-and-access-hatches/em-hatch
Closed hatch from top:
https://www.glazingvision.co.uk/rooflights/hinged-rooflights/
https://www.google.pt/maps/place/31+de+Janeiro+(Seg+Social)
Sadly, no longer relevant as council refused planning permission. 😞
https://www.whitesales.co.uk/products/smoke-vents-and-access-hatches/em-hatch