Last week Chancellor Alistair Darling warned us not to expect a giveaway in next week's Budget, while his Chief Secretary to the Treasury, Liam Byrne, reassured us that the Government could halve the deficit by 2013-14 without announcing any further tax increases. If both statements prove correct - no pre-election tax giveaway and no new post-election tax takeaway - then this would break the pattern of the last four general elections.