Well, here's part of what he said in Coventry
''There will be some who will tell you that Brexit is a disaster for this country and some who will tell you that Brexit will create a land of milk and honey.
The truth is more down to earth and it’s in our hands.
Brexit is what we make of it together, the priorities and choices we make in the negotiations.
This Conservative government is damaging our country and their priorities for Brexit risk increasing the damage.''
Seems like 'Brexit' happening is still the working assumption. Does supporting some kind of Customs Union mean Brexit is absolutely impossible? Turkey is in a customs union with the EU and will probably never be a member.