Public Nominations, of the kind Scrump talks about above would end up as.

1. A political party packs the meeting with it's own members, and gets it own candidate.


2. Respected professionals in an field stand on an issue, eg Doctors standing to fix the NHS.

3. Pop-stars etc, standing for no good reason.....

Plus, they all have the problem of they want to be in power. Never a good start.

My Suggestion.

Anyone registered to vote, who is over 30, and has achieved a reasonable level of education , should be entered into a lottery. If your name comes up, you serve a term in the House of Lords. In a stoke, the house should be balanced geographically, racially, and by gender.
The only exclusions should be for criminal offenses, minor ones for a few years, serious ones for life.