I actually try not to know much about actors and actresses personal lives
@Tocsin. I prefer to try to believe in the role they are playing rather than being swayed by thoughts of who they are in irl.
But in the case of Boris Johnson and Joanna Lumley it was impossible to avoid knowing about their social connection. And inevitably once known can't be unknown and forgotten.
The fact that you have grown to love this show for it's own sake rather than because of who is in it actually does you great credit. I realise I am being prejudicial when I am reluctant to give films/ radio shows/ TV shows a chance because for one reason or another I don't like the people appearing in it. Although I will say in my favour that I'm not someone who watches or listens to something just because I like a certain performer. I don't do uncritical adulation of anyone.