Hong Kong style milk tea originated from England's colonial rule over Hong Kong, from 1841 to 1997. You can easily find it in any local restaurant or cafe in Hong Kong. This drink is made with black tea and evaporated milk, or sometimes sweetened condensed milk and was heavily influenced by English customs.
In Britain, hot tea is brewed with Ceylon tea leaves and served with sugar and regular milk. But the Hong Kong style milk tea uses a much stronger blend of tea mixed with full-cream condensed milk for extra smoothness and aroma.