It is good news that hedgehogs still persist in Regents Park and that there is an immense effort going in to studying them in the park. However, in a decreasing population cut off from other populations by busy roads there may eventually encounter a problem with inbreeding. Hedgehogs may only survive in small pockets in central London and this could become increasingly common across the country if the decline in numbers continues. Linking these small populations will be essential in avoiding inbreeding problems and preventing further decreases in hedgehog numbers.