Small swings, high drama: why UK polls are less volatile than they seem – in charts

In what is beginning to look like a fragmented five-party system, small swings carry outsized political consequences

Cabinet reshuffles, party infighting, policy reversals, byelections, defections and apparently huge swings in support - the UK's political news cycle feels especially relentless at the moment.

But if you look closely at the polls since last year's local elections, remarkably little has changed.