The British Chambers of Commerce has published a list of 23 “real-world” questions that it says urgently need answers as the UK’s EU exit approaches.

The list covers subjects including VAT, tariffs, customs and regulations.

The BCC said companies were no clearer on these critical issues than they were immediately after the referendum.

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In a wide-ranging interview, BP’s CFO Brian Gilvary sets out the hugely complex set of issues he faces leading finance at one of the world’s biggest energy companies.

As well as managing the finance team at the UK’s third biggest corporate, Gilvary reveals his role in defining strategy and his involvement in some of the biggest business stories of the last 20 years.

From tackling the fuel crisis in 2000 to the Macondo oil spill, the huge clear-up and world’s biggest compensation deal to working with Russian partners and climate change, it’s all here.

His dealings with Blair, Brown, Cameron, Obama and Prince Charles are also revealed.