I thought 'RT Hon' was used during a person's tenure in office? What's meant by 'former' here, if you still have the title? 

I'm  sure you're a lovely bloke but  I've not bothered listening to the episode, mainly because of the Rt Hon title. It's supposed to represent respect and dignity in the UK - although every other person with the title here seems to be lacking. Infact - the absolute opposite.