United Kingdom Parliament
'The Rt Hon'
Privy counsellors have the prefix ‘The Rt Hon’ before their names. ‘Mr’ is dispensed with, but if a privy counsellor is also a knight, his correct style of address would be ‘The Rt Hon Sir Thomas Archer’.
If the privy counsellor is female ‘The Rt Hon’ replaces Mrs/ Miss/Ms in her style of address; if she is also a dame, her style of address would be ‘The Rt Hon Dame Elizabeth Kean’.
As membership of the Privy Council is an appointment rather than an honour conferred, the letters PC follow all honours and decorations awarded by the Crown.
All Members of the House of Commons of the United Kingdom have the letters MP after their names.