jura2, the present Labour part/movement policy on Brexit was agreed by the Twelve Thousand Delegates to the Labour movement conference last September. The National Executive along with Jeremy Corbin as leader of the Parliamentary Labour Party has remained constant in the view that the Conference policy is the best available for Britain and in that, time has proven it to be the only, "constant" in the whole Brexit debate.
Should the broader Labour movement in the Country feel that a change of policy is required, then (as always) a one-day recall conference can be convened, but no such request has so far been forthcoming.
Apologies for repeating the above once again jura2, but the Annual Delegate Conference is the primary policy-making body in the Labour movement, and that is a situation I and many others agree with.
When twelve thousand people voluntarily take time out of their annual holiday entitlement to attend a week-long conference, then that dedication has to be respected and their democratic decisions not changed on the whim of a few who feel they are bigger than the party and its constitution.