This is a recommended read published by the Economist. It argues that Theresa May’s ministers are carefully avoiding specific answers. But it points out she is systematically disowning many of the Brexiteers’ promises.
Personally, I think that Theresa May’s problem solving style for Brexit is sub-optimal. She expects to be presented with a considered best proposal for Brexit. Based on my many years experience delivering radical change, I’m convinced that this is naive and simplistic. A dynamic approach is required that reflects changing contextual factors – political, social and economic. I would recommend an Action Research approach facilitated by an impartial subject matter expert – this was my area of expertise before I retired.