>> Britain wants a temporary customs union with the EU to ensure free trade after Brexit. But it would seek out other trade deals at the same time, which could be a sticking point. Members of the EU customs union aren't generally allowed to negotiate their own trade pacts. But Brexit Minister David Davis said such a deal would be best for both parties.
>> In Italy I was 290 billion, we're selling them 230 billion a year. It's in their interest, BMW do not want to have to have a customs border that is going to slow down their sales or add administrative costs. Siemens is not gonna want to do that. And the port of Rotterdam is gonna want to have an efficient operation.
Biggest port in Europe, gonna want to have an efficient operation. So they've got an interest as well as us.>> An opposition politician though, said that the government wanted to have its cake and eat it. And many in Brussels may think the same, as Reuters UK political correspondent William James explains.
>> It's a unique solution but then this this whole situation is unprecedented at this there is no textbook on how to leave the European Union, no one's done it before. This is an idea that I think Britain's been after for a little while. But they've come out publicly and said it today.
This is seen to put it politely it's an ambitious target for the British government to go out and get this deal. The reaction from Brussels so far, the head of the European parliament's Brexit's negotiating team has said it's a fantasy that you could have an interim deal and go out and negotiate trade deals at the same time.
So it's not been well received, this was always an ambitious opening gambit I think.>> Tuesday's proposals aim to give businesses more certainty. They fear customs checks will cause expensive delays. Big firms are welcoming the proposals but warning the clock is ticking to get it right. The government also hopes the plan could avoid a hard border between Norther Ireland and the Irish Republic, which is an EU member.
UK Prime Minister Theresa May has made clear Brexit means leaving the EU customs unit, exactly when though, that's now open to question.