Velux blind. (Headington OX3)

Kindly got from another freegler but I miscalculated. 800 mm wide. One blind for a Velux window. This is both translucent pleated and blackout roller blinds (of which the room-facing colour is "sand"). These are for GGL MK08 windows (wooden frame, 78*140cm). We've discovered they don't fit GGU MK08 windows (maintenance-free frame, same size).