“The Mayor has no intention of using City Hall for pre-election party political purposes, so does not expect others to do so.”
Of course Boris would never consider using City Hall for party political purposes.
Well apart from when he used it repeatedly to hold secret meetings with his party political campaign manager of course.
And when that same campaign manager had un-minuted meetings with non-political City Hall staff.
Oh and when he gave that same campaign manager an access all areas pass reserved solely for City Hall employees.
But apart from all that Boris would never ever consider using City Hall for pre-election party political purposes. Oh no. Perish the thought!