"Another flaw is that PR could result in the more insidious parties gaining seats, while it would be virtually impossible for a local independent candidate to be elected."

This is interesting.

Yes, the BNP will have a better chance of winning a seat or 5 under PR.

However, one of the reasons people cite for voting BNP is that they don't trust the main parties in what they see as the current political stitch up. People feel disenfranchised and ignored, and they turn to the only party that claims to speak for them.

Under PR, people will be more enfranchised, and as a consequence they are more likely to use their vote constructtively.

Take note of the fact that in Barking and Dagenham, where a sustained camaign was waged by Hope not Hate to ensure that people were fully informed about the realities of voting for the BNP, the BNP lost all their seats.

This proves that involving the electorate in the political process and giving them proper meaningful information and trusting them to participate constructively DOES contribute to a more sensible and constructive political environment.

Informed and enfranchised voters are bad for the BNP.