Thermaline Basic 30mm 2.4m x 1.2m (Polystyrene backed plasterboard) 
Tyvek AirGuard Tape 60mm x 25m Roll 
The 10-49mm insulation includes all insulation thicknesses within this range. Helps you easily find the insulation sizes you, for example, the common sizes in this category include:
12mm, 20mm, 25mm, 30mm, 32.5mm, 37.5mm, 40mm
Brands that offer these sizes include:
Celotex, Kingspan, Isover, Rockwool, TLX and Knauf
10-49mm Insulation
£27.97 Inc VAT £23.31 Ex VAT
10-49mm Insulation
£23.63 Inc VAT £19.69 Ex VAT
10-49mm Insulation
£33.22 Inc VAT £27.68 Ex VAT
10-49mm Insulation
£7.65 Inc VAT £6.38 Ex VAT
10-49mm Insulation
£33.76 Inc VAT £28.13 Ex VAT
10-49mm Insulation
£38.58 Inc VAT £32.15 Ex VAT