DMcG,
Britain has said that.
Has it? I must have missed that. I am aware it has said it doea not want a hard border. I was not aware it had given an untaking not to impose any regulations that would require such a border. I would be glad of a link if you had one.

It has, and here is confirmation today from a Labour MP.
"We're not the ones who are going to be putting up the physical border. If it ends up with a no deal, we won't be putting up the border, they'll have to pay for it because it doesn't need to happen."
"If it ends up with a no deal, we won't be putting up the border, they'll have to pay for it because it doesn't need to happen."