tsubaki
Player Valuation: £90m
....which is exactly why having MPs select the candidates is the way to avoid extremists taking over the party.
The problem with that notion is that MPs define "extremism" really, really poorly.
Look at Labour for instance - where a socialist party, with a socialist membership, and which has a long list of socialist achievements that it is very proud of elected a socialist leader and large numbers of their MPs reacted by claiming he was a Marxist / Trotskyist / "f***ing racist". They tried to boot him out, purging thousands of members in the process, then when they'd lost that they sat out a GE campaign where a socialist platform ended up getting a better result than anything they'd come up with for twenty years.
If this country does have a problem with extremism, then its extremism of the centre.