Hope UK is a United Kingdom Christian charity based in London, England, which educates children and young people about drug and alcohol abuse. Local meetings started in 1847 and a formal organisation was established in 1855 with the name The United Kingdom Band of Hope Union.

The Band of Hope was first proposed by Rev. Jabez Tunnicliff, who was a Baptist minister in Leeds, following the death in June 1847 of a young man whose life was cut short by alcohol. While working in Leeds, Tunnicliff had become an advocate for total abstinence from alcohol. In the autumn of 1847, with the help of other temperance workers including Anne Jane Carlile, the Band of Hope was founded. Its objective was to teach children the importance and principles of sobriety and teetotalism. In 1855, a national organisation was formed amidst an explosion of Band of Hope work. Meetings were held in churches throughout the UK and included Christian teaching.

Set up in an era when alcoholic drinks was generally viewed as a necessity of life, next only to food and water, the Band of Hope and other temperance organisations fought to counteract the influence of pubs and brewers, with the specific intention of rescuing 'unfortunates' whose lives had been blighted by drink and teach complete abstinence.

Christians and Temperance Societies saw this as a way of providing activities for children that encouraged them to avoid alcohol problems. Alcohol-free premises were established, rallies, marches and demonstrations were mounted to oppose the "evils" of hard liquor that were attended by thousands of supporters, and coffee taverns were established to keep teetotallers on the straight and narrow path.

"Signing the pledge" was one of the innovative features. The pledge was a promise not to drink alcohol and millions of people signed up. There were also lectures that were illustrated by magic lantern, and noted personalities were invited to speak at public meetings in support of the cause. Guy Aldred was an active propagandist for the Band of Hope before focussing his activities on anarcho-communist politics.^{[citation needed]}

By 1897, its estimated membership was over 3 million. Band of Hope also had chapters in Australia prior to World War I. By the early 1950s, however, the temperance movement had all but succumbed to a changing society and cultural habits. Lack of support for the Band of Hope eventually brought about their transformation into Hope UK.

Hope UK remains concerned with children's welfare, giving priority to the development of resources and training for parents and children's workers of many kinds. The charity also attempts to persuade churches and other Christian organisations to include drugs awareness work within their programmes and play their part in helping to reduce the UK's alcohol and other drugs problems. Hope UK is a member of the National Council for Voluntary Youth Services (NCVYS).

The charity provides training courses across the UK, ranging from short workshops to two-day Open College Network (OCN) accredited courses.