The photo for this month's desktop wallpaper calendar was taken by Press photographer Anthony Chappel-Ross.

It features Green Knight steaming across the top of the North York Moors at Fen Bog.

Instructions:

1. Click on the dimensions of the picture most appropriate for your screen resolution.

2. Once the image has fully opened, right mouse-click on the image.

3. Choose 'Set as background' from the menu that appears.