Reuters reports, citing a Labour party source

Yvette Cooper's amendment basically lays out the option for parliament to come up with their own "Plan B" in order to prevent a no-deal Brexit outcome from materialising if Theresa May fails in her Brexit endeavours.

Labour backing such a move shouldn't be much of a surprise and is very much expected since Corbyn has been calling for May to rule out a no-deal outcome since the meaningful vote. The Sun is also reporting a similar story but at least this will help to reinforce the notion that the chances of a no-deal Brexit is indeed growing slimmer.