© Licensed to London News Pictures. 4/10/2013. NEC, Birmingham, UK. Grand Designs threw open it's doors today to welcome thousands of home design enthusiasts. Pictured, Kevin Loveday, left and Jason Thawley, ready their Tree Tent at the exhibition. The tree tents are made from sustainable products and can be hung from trees so they sway in the wind. Photo credit : Dave Warren/LNP