The UN have replied to Grant Shapps. Strangely Ban Ki-moon was too busy to reply personally. They are quick to distance themselves from Raquel Rolnik, saying she works in an “independent capacity”, is not a staff member of the UN and is “neither accountable to nor appointed by the Secretary-General”:

They do politely point out to Shapps that no rules have been broken. He’s just told the Sun: “People expect the UN to be neutral, yet on this occasion a former Workers Party politician came with a clear agenda.” Unsurprisingly, the reply is rather diplomatic…

UPDATE: Leaked emails from the UK Ambassador to the UN in Geneva back to the Foreign Office show what the unofficial reaction from the UN was over Rolnik:

‘The reaction here from UN agency heads and otjers [sic] has been who is that strange woman; why is she talking about bedrooms and why on earth do we have a UN Housing Rapporteur. So to a certain extent this is beginning to speak for itself. Which is helpful.’