"Voters sense Britain is becoming a state of failure; billions of pounds go into a health service riddled with delays and MRSA. More money on schools has seen standards actually decline. The criminal justice system is often useless. Government has lost control of our borders - as well as its own agencies and quangos.
Ponder the possibilities. A popular mood of radical anti-politics mixed with the internet; it could get interesting...."
Setting up new parties in a first past the post electoral system is foolishness and we're a very different country to the Netherlands so a British "Pim Fortuyn moment" wouldn't look like the Dutch one. Most likely it would either be within a current party or non-party. However, there are opportunities. Imagine if an MP had really taken the Government - and the wider political class - to task for their pathetic response to the Danish Cartoons crisis; their lamentable failure to defend free speech against threats and religious hysteria. I think there were signs in the polls that they might have found a very receptive audience.
Out of sparks like that it might be possible to build a movement that would build upon deeply felt nationalism, discontent at an increasing decline in personal sovereignty and robust attachment to Western values.