In 1983 President Reagan apologised to the British prime minister after the US invaded Grenada – a Commonwealth country – without giving her advance warning. This newly released tape recording of a private telephone call between them reveals the conversation. Subscribe to The Guardian on YouTube ► http://is.gd/subscribeguardian Support the Guardian ► https://support.theguardian.com/contribute Today in Focus podcast ► https://www.theguardian.com/news/series/todayinfocus Sign up for the Guardian documentaries newsletter ► https://www.theguardian.com/info/2016/sep/02/sign-up-for-the-guardian-documentaries-update The Guardian ► https://www.theguardian.com/ The Guardian YouTube network: Guardian News ► http://is.gd/guardianwires Guardian Football ► http://is.gd/guardianfootball Guardian Sport ► http://bit.ly/GDNsport Guardian Culture ► http://is.gd/guardianculture #MargaretThatcher #RonaldReagan #Thatcher #Grenada #USA #UK