oh apparently, whilst phileeeeep is a prince consort, he is not titled as such. so clear. Thank goodness for Wikipedia, source of everything correct...
https://en.wikipedia.org/wiki/Prince_consort
....but it does seem to be because a king would outrank the queen which is obviously undesirable when the bloke in question is a mere consort.
I wonder if this still stands, now the males-over-females element has been removed from the line of succession?