Some parties get direct input from citizen members of the party when selecting a leader (think primary election in the US).

Some ... but not all? What do those parties do?

I was commenting generally and not specifically to any party in the UK. I suppose different political parties have their own systems for internal elections that vary from each other (i,e/ In the US the Dems have "super delegates," party insiders with more influence in the leadership selection process).

As for the House of Lords/Commons question, not something I know about. Maybe someone in the UK can answer.

Some parties get direct input from citizen members of the party when selecting a leader (think primary election in the US).

Some ... but not all? What do those parties do?

I was commenting generally and not specifically to any party in the UK. I suppose different political parties have their own systems for internal elections that vary from each other (i,e/ In the US the Dems have "super delegates," party insiders with more influence in the leadership selection process).

As for the House of Lords/Commons question, not something I know about. Maybe someone in the UK can answer.