IdealGov can continue. Delighted to say the powers that be at GNM listened carefully and have had a change of heart. Given the community it has formed, and once they took on board the problems that changing domains would cause in terms of broken links etc they have - very kindly, I must say - decided simply to hand the site over with no strings attached. Very big thank you to them.
So we’ll get the domain transfer sorted outm then port the whole thing to Wordpress (which no reader need care about but which will save me endless hassle) and see if we can bring back the original Platform1 design. Then we have a big fat new project. Hurrah!