The ballot will also ask those members who do vote against the deal if they wish to have a further ballot on various forms of industrial action.
Unite head of health Kevin Coyne said there was considerable anger and ‘an increased sense of militancy' within the union following the offer of a pay deal worth just under 8 per cent over three years.
'There was a very strong feeling that the three-year pay offer was woefully inadequate...especially when you consider the very real inflationary trends in the economy such as soaring petrol prices and runaway utility costs.'
Mr Coyne said Unite wished to strengthen the independence of the Pay Review Body after NHS Chief Executive David Nicholson warned that this year's pay award could be staged if unions don't accept the three-year package.
The ballot closes on 11 June. NHS Employers and NHS unions are due to meet again on 1 July.
Comment below and tell us what you think