Brexit: A tough to-do list for Whitehall

Charles Grant from the Centre for European Reform says Theresa May has a "six pack of difficult deals". He predicts that Britain's exit from the EU will require at least "six interlocking sets of negotiations".

He says: "If the British government wants the talks to run smoothly, it will need to earn the goodwill not only of the countries in the EU, but also of those in the World Trade Organisation. The Brexit negotiations will take much longer and be far more complicated than many British politicians realise."