Okay, but we're in no position to stop anything, are we? We're powerless to stop Brexit because we don't control government policy.
And there isn't one. And that's why you're fucked. It's because there is no party that wants to stop Brexit. Not in England, anyway.
And where is the party with the policy? There isn't one.
A referendum is just a means to an end. It's a way to execute or validate a policy, but it's not a policy in itself.
A referendum is not a policy.
If the Liberal Democrats want to stay in Europe they can bastard well fight for it. And if they're not going to fight they can fuck off because we've got cowards enough already.