Window screens, simplicity, & peace of mind for the UK! Every Open Window.....is ALSO A DOOR!! HappyWindow.co.uk protects the things you love most...your family, pets, possessions & even clothes ! We offer the highest quality adjustable window screens (aka fly screens) on the market designed to help your windows instantly achieve their full potential and you transform your home. No tools, no hassle, no fuss....happiness couldn’t be easier to achieve & doesn't cost much.