Listen: Tuesday's Today in Parliament
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Susan Hulme reports from Westminster where a former head of the World Trade Organization, Pascal Lamy says he cannot see how to avoid customs posts between Northern Ireland and the Republic.
Also on the programme:
* former bosses of the collapsed construction firm Carillion were described as 'delusional' by a Labour MP when they gave evidence to a Commons committee
* the chief executive of Cambridge Analytica, Alexander Nix has denied claims that his firm influenced the outcome of the 2016 EU referendum.