If you disturb a nest with an adult hedgehog in it, replace the nesting material. The hedgehog can then either repair the nest or build another elsewhere. If the disturbed hedgehog is hibernating and wakes up, a dish of dog or cat food and some water each night until it starts hibernating again would be helpful.
If there are babies in the nest, again replace the nesting material, handling the nest as little as possible so as not to leave your smell on it. Keep an eye on the nest to see if mum returns. If there is no sign of her by the next morning ring Brackley HogWatch on 07528 119416 Do not allow friends, children etc to uncover the nest for a peep. If the mother has returned, she may abandon or even eat her young if she is further disturbed.