In the event of a 'No' vote on Thursday, the pressure will turn to the creation of an English parliament. Whilst John Redwood's proposals to use the existing parliament buildings are OK as a temporary fix, he assumes that MPs elected to a United Kingdom parliament will also automatically be our English parliament representatives. I don't think this is workable.
I think we need a much-reduced UK parliament of perhaps 320 members to deal with defence, international relations, UK finance and suchlike matters and an entirely separate English parliament. Whilst this will be the subject of much debate, we should throw in the reservation of a central London site for an English parliament - should this be required. In effect, we need to identify a site and embargo any alternative re-development until the EP matter is decided.
The existing MOD building is a prime candidate. It's not old, valuable or architecturally distinguished and makes poor use of the site footprint. It's sized for a cold-war scale caucus of defence civil servants from the days of typewriters and carbon paper - in other words, far too big for the size the current London MOD needs to be. They could move back into the old War Office building.
With the Wales Office next door, and a building opposite used by the Scotland Office (which could become the Northern Ireland Office after Thursday in the event of a 'yes' vote) so ideally situated.
Outline plans below of current and future;