Downe Bank is a nature reserve owned and managed by the Kent Wildlife Trust in the North Downs, close to Downe in the London Borough of Bromley. It is a Site of Special Scientific Interest (SSSI) together with the neighbouring High Elms Country Park. Located close to Charles Darwin's home, Down House, it was one of his favourite places and helped to inspire his work.

Kent Wildlife Trust (KWT) is a conservation charity in the United Kingdom that was founded in 1958, previously known as the Kent Trust for Nature Conservation. It aims to "work with people to restore, save and improve our natural spaces" and to "ensure that 30% of Kent and Medway – land and sea – is managed to create a healthy place for wildlife to flourish". In 2023, they have reported over 30,000 members and an annual income of £8 million. KWT manages over ninety nature reserves in Kent, of which thirty-seven are Sites of Special Scientific Interest, three are national nature reserves, five are Special Areas of Conservation, four are Special Protection Areas, six are local nature reserves, thirty-eight are in Areas of Outstanding Natural Beauty and one is a scheduled monument.