Assuming it is required, had anyone fitted one of these:
www.nationalinsulationsupplies.com
If not, are there any other options for improving insulation that don't involve ripping up the ceiling?
ARC Retrofit Eaves Insulator | Addresses Heat Loss
Improves thermal efficiency by tackling heat loss at the eaves junction → Innovative wedge-shaped design with hinged ventilation tray ✓ Prevents condensation and mould
www.nationalinsulationsupplies.com
If not, are there any other options for improving insulation that don't involve ripping up the ceiling?