Leaving the EU would take at least 2 yearspublished at 07:01 British Summer Time 30 March 2016
Today Programme
BBC Radio 4
The former cabinet secretary, Lord O'Donnell, has told the BBC that Britain would be unable to negotiate any departure from the European Union within two years - as set out in EU rules.
His warning has been rejected by campaigners who want the UK to leave.
*His nickname is GOD...Gus O'Donnell*