169 | Who is Boris Johnson?

We try to work out what the current favourite to be next Tory  leader actually stands for.  Can his time as Mayor of London tell us what kind of PM he might be?  Will his journalistic past come back to haunt him?  Does he have a political philosophy beyond 'doing Brexit'?  Plus we discuss whether the Johnson-Trump comparisons really stand up. With Helen Thompson and Chris Brooke.

168 | Constitutional Breakdown

We ask whether the UK constitution is cracking up - and if so, where's the breakpoint going to come?  Is Brexit at the heart of the current crisis or does it go deeper than that?  What's the role of the Supreme Court?  And the Queen?  Could the Bank of England play a part? And where does Scotland fit in?  We try to piece it all together with Helen Thompson, Chris Bickerton and Kenneth Armstrong.

167 | Jared Diamond

We talk to the author of Guns, Germs and Steel about his new book on nations in crisis.  Jared Diamond argues that personal crises are a good way of thinking about national ones.  He tells us about one of his own personal crises and we see whether the lessons really apply to politics.  Plus we discuss what's gone wrong with political leadership in the US and we explore what it would take to tackle the global environmental crisis.

166 | Split Down the Middle

David and Helen catch up with the European election results and the Tory leadership race - there's lots to talk about.  How can the Tories compete with the Brexit Party?  Are the Liberal Democrats a real threat to Labour?  What does it all mean for Ireland?  And for Scotland?   Plus, is the surge in support for Greens across Europe a signal that it's time to take environmental politics seriously?

165 | The Next PM

As Theresa May's premiership gets very close to the end, we talk about who and what might be coming next.  Can her successor re-establish the authority she has lost?  Can anyone govern in this parliament or do we need a general election?  Is the age of long-serving prime ministers also coming to an end?  Plus we discuss what lessons can be drawn from the recent election in Australia: what does it tell us about the politics of climate change?  With Helen Thompson and Chris Brooke.

164 | Death of the Republic

We talk to historian Tom Holland about the fall of the Roman Republic and the parallels with today.  Why does Roman history still exert such a strong pull over our imaginations?  Are politicians like Trump and Berlusconi recognisable types from the ancient past?  And is contemporary democracy vulnerable to the same forces that brought down the Roman Republic?  Plus, we discuss Putin's claim that Russia is now the Third Rome.  What is he getting at?  With Helen Thompson.