WOULD NIQAB BE ACCEPTABLE ON THE BENCH?

The wearing of the niqab in public places has been a newsworthy subject in the last weeks. In particular there was the decision regarding a witness in a recent case at crown court. I have many female Muslim colleagues and only one have I seen wearing a hijab (Muslim headscarf). A very small minority of those female and apparently Muslim by name lawyers who appear before us wears a hijab. There is absolutely no question as to their right to do so. 

My point today is whether or not Appointment Committees have a policy if faced with an application by a woman who wears a niqab. Would wearing such on the bench be acceptable both to colleagues and to the court and all its users?