Don't know which planet you are on,but on Earth there is a Labour conference on at the moment.If Labour policy was a second referendum,I'm sure they would have announced it.In fact,the Glorious Leader has let it be known that staying in the single market is a complete no-no.The rules make it impossible to re-nationalise the railways,you silly-billy.
I think you will find that French railways are state run and German railways largely so . So perhaps not so silly. I know of course that Labour policy is not yet a second referendum. However two things might well happen post a disastrous negotiation. Firstly there will be a swing in public opinion against Brexit and secondly it will be obvious that the country needs rescuing. The Labour Party will then see a second referendum as a way of securing power in a general election that will surely follow