I would get going very early on macroeconomic modelling, get a person in place to run it, perhaps with people on contract in the short term, and get working on the elements that relate to the Scotland Act 2012 requirements as soon as possible in close consultation with the OBR, but I would also think through what would be required post a yes vote in the referendum next year so that, if there is a yes vote, work can accelerate towards being ready by the date...