Interesting question Margaret. In the first instance, in all matters like this, the ultimate criteria is the question of
'Need' i.e. so employment/money spinner that Blythes bring in over-shadows the projected employment/commercial/aesthitics viability of the proposed plans.. health reasons is the big one. Doubt whether we could shift 'em due to these criterias.
Presume, that was what it was decided on in the end.
As in the Whitebirk thread being discussed .... all financial really, to bring money into the pot to keep us all in the style we are used to ...

And build for the future of course.