The TUC Congress opens in Bournemouth today with a warning that unemployment could be as high as 4.75 million.
A TUC report published ahead of the south coast meeting said wider measures of joblessness should be incorporated into the total, including the economically inactive.
As well as the 2.5 million official jobless figure, a further 2.26 million people want a job but are not classified as unemployed, the TUC said.
More top news
The vice presidential candidate was travelling with his wife, daughter and several campaign advisers, but no one was injured.
They deny a 'sweetheart deal' - but a senior source told ITV News the government promised to support such firms in the event of Brexit.
The father of Captain Khan, who died in Iraq in 2004, said the comment was "the most cruel thing you can say to grieving parents."