Government of Wales Bill

I share the concern of the hon. Member for Dumfriesshire, Clydesdale and Tweeddale (David Mundell) on the specific principled point that, in introducing retrospective legislation, there is a possibility that we will create an environment where individuals fall foul of a law that did not exist in the past. I accept that the Minister is seeking to assure us that the legislation will always be compatible with the Human Rights Act, but how can he reassure us that the spirit of justice will be ensured if we are introducing legislation which goes back to a time when it did not exist?