This image by George Nash was taken in Eastnor, Hereforshire, and shows a carpet of bluebells typical of late spring
Bluebells are found in many British woodlands, and transform the ground into a carpet of blue for a few weeks every year. They tend to appear in April or May, taking the opportunity to grow and bloom before the trees grow their full summer foliage and block sunlight from reaching the ground.
This photo was submitted by George Nash or Ledbury, and was taken in nearby Eastnor. It's most famous for Eastnor Castle, which was built in the 19th centrury, but styled to look like a medieval fortification. It's appeared in a number of television programs, and the grounds host a number of festivals. If you would like to see one of your photos featured, you can submit it for future OS Wallpaper - see the full submission guidelines here.
Universal Mobile Wallpaper: Should work for most mobile devices. For Android devices will show more of the image as you swipe between screens.
To save the image on a computer, right-click (or alt-click) and select 'save target as' or the equivalent for your browser. For most computers, right click the desktop and select 'set wallpaper' to change the wallpaper image. For iOS devices, select the image, press and hold on the image to 'save image', then go to Photos > Share > Set as Wallpaper. On Android devices, select the image, long press to 'download image' and then go to Wallpapers > My photos and select the image.