What's behind the UK-EU deal on Northern Ireland?

The UK and EU have reached an agreement to break the deep stalemate on trade and customs in Northern Ireland. The deal came nearly seven years since Britain voted to leave the European Union. So, is Brexit finally done? Or will there be further objections? Join host Sohail Rahman. Guests:  Jill Rutter - Senior Fellow at the Institute for Government. Brian Feeney - a Historian, Author and a Columinst with the Irish News in Belfast. Donnacha Ó Beacháin - Professor at the School of Law and Government at Dublin City University.