It is widely assumed by politicians and pundits alike that local elections are less about rubbish collection and street lights, than they are about national politics. Local polls offer voters the chance to pass judgment on national governments, and it is often a negative appraisal—hence the lament of “mid-term blues” by ministers in television studios on election night. There is indeed a lot to be said for the claim that national politics predominates. In the 1990s, the Conservatives withered away in local government as John Major’s unpopular administration governed in Westminster. The same fate befell Labour under Tony Blair and Gordon Brown a decade later.
That does not necessarily mean, however, that mid-term polls are a good indicator of which party will win the next general election. Local elections allow voters to say whether or not they are satisfied with the government’s performance to date. General elections, in contrast, ask voters which of the potential governments on offer they prefer. That is a very different question. It explains why a governing party may receive a severe kicking from the voters in mid-term locals but ease to victory when the national poll comes round. No matter how unpopular a government appears to be mid-term, its national strength will be threatened only if the major opposition party is a credible government-in-waiting.