... is expected to increase road tax on the worst polluting vehicles while reducing excise duties for owners of more fuel-efficient cars. Taxes on so-called "gas guzzlers" bought new since April are expected to double to about £400 over the next two years, while most cars owners will face inflation-linked increases. The lowest emission cars will continue to be free of excise duties.A similar story appears in The Independent (here) and The Times (here).
It rather detracts from the surprise element of the budget. And it is so obviously co-ordinated leaking for effect.