The figures should be interpreted with caution as Labour-controlled inner-city boroughs are on average a little smaller than the outer boroughs and also because Tory voters, who are more likely to be working or to live a long way from the nearest polling station, may be more likely to want to vote by post. Some boroughs, such as Barnet and Hackney, have also promoted postal voting heavily. Hackney held an all-postal election for its borough council in 2002.