My advice to Ukip is to savour this moment. After being repeatedly being dismissed and written off, their performance in last week's local elections was the story of the day. They took over a quarter of the vote where they had candidates, and that was in many more seats than before. They won well over 100 council seats. The commentariat are reeling, and were talking about little else over the weekend. As the dust settles somewhat, what are we to make of it?
The obvious comparison is with the Lib Dems and their predecessor parties in their two separate golden runs, in the 1980s with the rise of the SDP, and in the 1990s after the merged parties recovered from their near death experience. Those were golden moments for their supporters. But by and large they presaged disappointment in the subsequent general elections (though not in 1997). Many predict the same fate for Ukip. But their influence on British politics could be profound.
They are, of course, a very different party from the Lib Dems and their predecessors. The latter always had one foot in the political establishment, however much they were outsiders to government itself. Ukip are complete outiders; while they pick up the odd defector from the Conservative party, they are not high flyers - like Roy Jenkins or Shirley Williams were. Ukip are from the political right, and rebel against Politically Correct notions, where the Lib Dems were liberal and, if anything, more PC than the others. But both parties have a set of clear core values which can bind activists to the cause, and both have proved able to pick up a mid-term protest vote. Many voters feel badly served by established politicians, and want to kick them by voting for somebody else, when not much is at stake.
But the Lib Dems have been able to do more than this. They have built a big wedge of MPs and a solid presence in local government, which in turn has led them into coalition government at national level. Could Ukip do the same? We should put aside two common criticisms of the party. First is that it is a "one-trip pony", obsessed with Britain's membership of the European Union, an issue which doesn't really engage the British electorate. The party has successfully branched out into capitalising on anti-immigrant feeling however, giving it a much broader policy appeal. Attacking immigration policies is a wonderful political tactic for opposition parties; the government can't do that much in practice about it, and to the extent that they can, nasty consequences would flow. And they can add a few other goodies of more local appeal, like attacking wind farms. The second criticism is that they are too dependent on their leader, Nigel Farage, who is a bit of a media star. There may be some truth to this, but we must remember that it is of the nature of minor political parties that the media concentrate on just the personality of the leader. It was a common criticism of the Lib Dems that they were too dependent on whoever their leader was at the time. In fact strength and depth was being built from beneath. This could easily prove to be the case for Ukip too.
Ukip still has two deeper problems. First are its libertarian and socially conservative policy ideas. Worries about immigration and the EU can rally a broad spectrum of voters, but when you start wanting to dismantle the welfare state and cut taxes for the rich, you are backed into a minority. The second is linked, and it is that both their activists and voters are predominantly drawn from older people. Can such people put together hard hitting and disciplined ground war machines in the way the Lib Dems achieved?
And this leads to their main significance to British politics (this applies almost exclusively to England - but the implications apply to the whole country). To the extent that Ukip are able to capitalise on their current success, it will be at the expense of the Conservative Party's core vote. Ukip are currently drawing voters from all over the place, but when it comes to activists and committed voters, this will surely mainly come from the Tories. Labour politicians fantasize that they will split the Tory vote, and let Labour into a majority, much as the SDP split the Labour vote and kept Mrs Thatcher in power for so long. Some Tories are suggesting some kind of electoral pact with Ukip to stop this from happening.
Behind all this I see the murky presence of what I call the "Dark Forces". These are a collection of newspaper proprietors (Murdoch, the Barclays, Dacre and Desmond) and big party donors, who have a political agenda not dissimilar from Ukip's. So far they have found Ukip a useful stick with which to beat the Conservatives. If Ukip do well, then it proves to them that their policies are vote-winners. But the one thing that unites the Dark Forces more than promoting their conservative-libertarian agenda is their hatred of Labour. If Ukip are posing a serious threat to the Tory majority in parliament that they crave, then they will turn on them.
There is plenty of time for this. The more the Conservatives are running scared, the more they will curry favour with the Dark Forces. There are signs of this already, with the Tories softening their stand on press reform. Ukip will be allowed a clear run up to next year's local and European Parliament elections, where in the latter case they stand a good chance of being the top party. Then the worm will turn. The press will start stoking up fears about Labour's plans to raise taxes (the truth never did stop the British press - Labour's softer stand on austerity policies will give this line all the credibility it needs), and building up the Tories as the only people that can stop them. Will it work? It might. The press remains extremely powerful in the British media (the BBC seems completely cowed by them these days); I can't see any obvious signs that the Labour leadership understands the danger.
The British political soap opera edges towards a gripping climax in 2015.