Former Scottish Secretary Michael Moore has vowed to be "positive but not uncritical" after he was named Nick Clegg's adviser on European business.
The new, unpaid post comes as the Liberal Democrats step up their campaign for the UK to stay in the EU ahead of a pledged referendum in 2017.
Mr Moore will have support from civil servants in the Deputy Prime Minister's Office and be expected to prepare a report by July.
The Border MP was replaced as Scottish Secretary by Alistair Carmichael.
Mr Clegg described it as a "very important role".
Mr Moore added he was "pleased to play my part to ensure the government is doing all it can to support business efforts to build a secure economic future for the UK in the EU".
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