There would be only one company in Malmesbury that would be in the frame to build a factory that size-as their new factory is already well under way it is unlikely that they would be interested in Hullavington.
In any event, the site would have to be put on the open market so that the taxpayer can see that it has been properly exposed to the market and the best price achieved.
And then there is the small question of planning permission.
Don't hold your breath on this one. Sounds like Kemble all over again.