The issue focused on by law professor Brian Martin on Tuesday has come up again and again on the BBC's Andrew Marr Show.He asked Mr Cameron how he would ensure he did not fall foul of "left-wing lawyers" who want to limit or restrict his powers. Mr Cameron said he would look at "what we can do to try and stay within the UK", while Justice Secretary Chris Grayling said he would look at all options to ensure "there's no gap between what he can do and what he