Heather Stewart and Polly Toynbee assess party campaigns in the run-up to the regional and local elections on 6 May. Aubrey Allegretti asks the pollsters Emily Gray and Joe Twyman what to expect. Plus, 100 years after the partition of Ireland, Rory Carroll is joined by Prof Peter Shirlow and Patricia MacBride to look at the future of Northern Ireland. Help support our independent journalism at theguardian.com/politicspod