The UK Brexit secretary says he expects Parliament to 'uphold' the government's policy of leaving the customs union. All EU countries are automatically members; it means there are no internal taxes on goods that are transported between EU countries. But David Davis told MPs it was 'vital' to leave - and wouldn't comment on what would happen if they defied ministers over the issue.
Jessica King has more from London.
IN: The customs union
OUT: SOC
DUR: 33 secs