Moles themselves do no direct harm, although evidence of their presence (the molehills) may be unsightly and their tunnels may affect some plants in a garden. Such signs of mole activity are most obvious during winter months, when plants have lost their leaves. As moles do little harm, there is an argument for tolerating them. As a result, many people suggest just removing the earth that makes up the hills and ignoring the animals’ presence, as well as their continued disturbance. Mowing the lawn more frequently, or letting children play on it, may help to deter the animals. However, we can understand that removing an animal is sometimes the only answer.
Although there are many methods that allegedly get rid of moles, there is no scientific evidence for their effectiveness. Some of these include putting milk bottles base down in the soil, vibrating probes or children's seaside windmills sunk into the moles' runs, or planting 'repellent' plants such as caper (or mole) spurge or plants from the allium (garlic!) family.
Trapping may be the best method if moles have to be killed, although from a welfare point of view it cannot be considered totally humane as the traps may not always kill the mole outright. Trapping is therefore best done by an experienced professional. Look in your local telephone directory to find your nearest pest control company.