Collection points for unwanted hearing aids can be found at a variety of places like doctors surgeries, hospital audiology departments and some charities and charity shops.
The NHS will take back any unused hearing aids they originally provided, with the newer models being refurbished to then be used by other patients.
Hearing aids donated to charities are repaired, refurbished and sent overseas for re-use in developing countries. The Lions Club has information on their website about collecting unwanted or broken hearing aids. They might be worth contacting to find out more!