According to this article hedgehogs could be at risk unless we take methods to save them. One suggestion is to create hedgehog friendly zones in communities to increase the areas over which the creatures can roam. This would involve householders linking their garden by creating small holes in shared walls and fences to increase the areas over which the animals can roam.
Hedgehog numbers have dropped steeply over the last decade, with the decline being blamed on the fragmentation of their habitats by road and house building schemes. Thousands of hedgehogs are also killed on the roads every year. The People's Trust for Endangered Species (PTES) is now mounting a campaign to try and reduce the decline. As well as allowing hedgehogs to pass between properties, householders are also being encouraged to provide suitable hibernation areas in their gardens and provide conditions that attract insects such as log piles of leaves and areas of long grass. I will certainly be doing all of these things to see if I can attract some hedgehogs to my garden.