Russian-installed authorities in occupied parts of Ukraine have been holding so-called referendums on joining Russia. Polling has begun despite worldwide condemnation and a warning from the UN chief - that the results will not be recognised. Ballots are being collected in the regions of Kherson, Zaporizhzhia, Luhansk and Donetsk - an area making up about 15 percent of the Ukrainian territory. As voting continues, Kyiv say it has recaptured more ground in its continuing counter-offensive. The voting is expected to last several days and result in the regions' annexation by Moscow. Ukraine and Western governments say they won't recognize the outcome. We talk about Russia's latest moves with Petro Poroshenko. He was president of Ukraine from 2014 to 2019.