Wrong. The Conservative Tories did extremely well. They took votes away from all the others...except the Scottish Nationalists who took votes away from Labour but not the Tories. No overlap between the Scot true loonies and the Tories.
I don’t think a BNP to Tory switch is credible — even in the Tory sweep and winning only a single seat, UKIP took third place in total votes cast — and I think if polls confirm my analysis it will be a shame because it will make it easier for the main parties to portray UKIP in an unfavorable light, but I still suspect that’s what happened to the BNP vote.