The Times religious affairs correspondent Ruth Gledhill told the BBC the announcement could prompt "hundreds, possibly thousands" of layministers to follow the bishops' example.
He told MPs that responsibility for the administration of devolved elections ultimately lay with the UK government and ministers would do all they could to ensure the "smooth running" of the elections.
It is not just that the four main hopefuls have experience of opposition (as advisers) and of government (as ministers), yet are young enough to lay claim to the future.