In reply to muppetfilter:
Probably not a lot you can do about your neighbour's plans I'm afraid. However, you can perhaps mitigate the effects of it by making your own garden as hedgehog friendly as possible by:
Providing hedgehog hibernation boxes (I now have 7, including two I built myself from left over building materials).
Providing suitable food and water (I get my hedgehog food from a company called Ark Wildlife - always get great service from them).
Providing easy access e.g. openings under / through fences.
Providing cover e.g. hedgerow, shrubs etc...
Apologies, I expect you know the above already, but thought it worth mentioning.
Great that you are doing your bit for these wonderful creatures.
Neil