When Amazon launched its unlimited music streaming subscription in the UK, it offered access to over 40 million tracks, thousands of curated playlists and tight integration with its Echo speaker. The one thing it didn't provide was a dedicated family plan like those offered by Spotify and Apple Music. It took more than three weeks, but Amazon has today extended its subscription to include a Family option -- it costs £15 a month or £149 for a full year and allows up to six people to stream to their heart's content.