Parliamentary Scrutiny of Leaving the EU

The right hon. Gentleman said a moment ago that the great repeal Bill will give us some certainty, so may I ask him for certainty on environmental legislation in particular? Even when EU legislation has been enshrined in UK law, we need to know, first, the extent to which any future changes to environmental safeguards will be subject to parliamentary scrutiny and vote; and, secondly, what kind of accountability mechanisms he imagines will be in place. Once we are out of the EU, we lose access to the European Court of Justice and the Commission. How will that environmental legislation become judiciable?