Sir Keir Starmer, Rebecca-Long Bailey and Lisa Nandy were grilled by party members in Glasgow.
The name of Scotland's only Labour MP will be on the ballot paper.
MSPs dismissed the bill blaming lack of clarity over the total cost of such a scheme.
Labour leadership contender Lisa Nandy has suggested the decision on whether to hold a second independence...
The Labour leadership contender said he wanted a new constitutional set-up 'based on federalism'.
Phillips dropped out of the race to succeed Jeremy Corbyn but is backing the Edinburgh South MP for deputy.
Edinburgh South MP Ian Murray said he is a 'fighter and a winner' at his campaign launch in Edinburgh.
The shadow business secretary says independence would be for the people of Scotland to decide.
Scotland's only Labour MP has launched a bid to become the deputy leader.
The MP retained his Edinburgh South seat with a majority of more than 11,000 in the December election.
The number of private sector businesses operating in the country has risen by more than a quarter since 2007.
Former RBS chief executive Ross McEwan, actress Maureen Beattie and ex-politician Brian Wilson are also recognised.
Ian Murray has written to fellow MPs to see their views on standing.
Laird had been Kirkcaldy and Cowdenbeath's MP since 2017 but lost her seat to Neale Hanvey.
Boris Johnson's party has cleared the hurdle of seats needed to govern in the Commons alone.
The Labour leader described the general election result as 'very disappointing'.
The SNP are on course to win 55 seats, up 20 and their second best result of all time.
All the Scottish party leaders are out on the campaign trail ahead of Thursday's election.
Denise Findlay was expected to investigate general election candidate Neale Hanvey.
All the main UK-wide parties have now revealed their pitches to voters ahead of December 12.