London's Kew Gardens launches 'Halloween at Kew', a new light trail featuring 'spooky' scenes such as a haunted pumpkin farm and a spider web tunnel. "I hope it brings a lot more people into the garden, and to look at Kew in a different light is very spooky, and it's quite exciting," says Kevin Martin, head of the tree collection at Kew Gardens, which boasts the world's largest botanical collection. IMAGES AND SOUNDBITES