Tony Bliar of all people spoke with great lucidity and logic this morning on R4 - worth hearing it.....he would take your C, fiction, and split it in 2 - (i) are we going for a hard exit as in a Canada-style deal or (ii) a soft exit as in Norway, the former more disruptive to the economy in the short-mid term, the latter being more accommodating of some deal (not necessarily full on union) with the EU customs - and, if so, it would remove the Irish border issue or at least reduce it considerably. The trouble is May tried to get the best of both or didn't realise that it would split like this - and now she and Parliament have to make their minds up....and he argued that more time will be needed.