When a party is riven with division people do not know what it stands for. Though both major parties have been subject to internal conflict over the years, it is the Labour Party which has been more given to damaging splits. The divide exposed by the Corbyn insurgency is only the most recent example in a century of destructive infighting. Join Patrick, who was senior policy adviser to the Prime Minister (2001-05) and head of policy planning in 10 Downing Street (2009-10), for his insightful, knowledgeable talk.