I'd say that the BBC is fairly evenly balanced, but others would disagree. They give most coverage to Labour, which is fair enough because they're in government, followed by the Tories and the Lib Dems.

British newspapers come in both Liberal and Conservative flavours, with the Guardian and the Independant being leftie, whereas the Times and the Daily Telegraph lean more to the right of centre. They'd be the four major 'broadsheets', so I guess the balance there is fair. On the other hand, I'm pretty sure that the tabloids will tend to lean more to the right.