Personally I think the likes of Smeeth and Snell are trying to pander to voters who are largely lost to Labour anyway.
Voters who want a No Deal and have Brexit as a high priority in terms of issues they are voting over aren't going to be voting for Labour whatever Labour say. As pissed off as I am with Labour's position, or lack thereof, on Brexit, Labour is never going to be able to offer the kind of Brexit rhetoric to placate that ovting group that a twat like BoJo the clown is.
Labour's chances of electoral success, basically now depend on Remainers being willing to hold their nose and vote for them, maybe that can make that work again as it almost did in 2017, but I'm not convinced, the LibDems seem to be in the process of being detoxified and that will probably do for Labour in the end