Re: Maybot to the rescue
"our Prime Minister elect(hah!)"
I take your ironic point that we don't directly elect Prime Ministers. However to style someone as '$OFFICE elect' indicates that although they have been elected to that office they haven't yet taken it up. It would have been correct to refer to Trump as POTUS elect between his election and inauguration, subsequently he became simply POTUS. By contrast, as May is PM your use of "elect", even ironically, is inappropriate.
"Simply POTUS" is left on the table for those of you who want to play with it.