Install an external blind. Velux produce them - anti heat awning blinds. “Block out 78 percent of the sun’s direct heat. “Mesh blind maintains daylight and the view.

Households with windows in their roof are being urged to get a special type of blind that can protect against the heat. Many ...

Velux themselves describe the blinds: "A VELUX anti-heat blind is an external sun protection for roof windows that is perfect for blocking strong sunlight and heat before they reach the window pane.

If Velux windows proposed to the side/front elevation it is not exempt. This should be enough comfort to confirm that you can proceed with your proposal without planning permission in your locality.

The sun will blast in all day long. Install an external blind. Velux produce them - anti heat awning blinds. "Block out 78% of the sun's direct heat. Mesh blind maintains daylight and the view.