Debt as a percentage of gross domestic product (GDP) - a broad measure for the total economy - hit 65% in May, up from 61.3% last year.
April's borrowing figures were flattered by a one-off £28 billion lift from the value of assets transferred from the Royal Mail pension plan.
But excluding this one-off impact, total borrowing for the current financial year stands at £28.4 billion.
Earlier this month, the Chancellor and Governor of the Bank of England Sir Mervyn King unveiled a multibillion-pound lending scheme to stimulate economic growth - but ministers insisted the move was not a "Plan B".
More top news
North Korea has blamed Malaysia for the death of Kim Jong-nam, the half-brother of North Korean leader Kim Jong-un.
Following months of speculation, the former Girls Aloud singer has finally gone public with her pregnancy.
No surprise that David Bowie won at the Brits tonight, the show felt dominated by the stars that have died in the past year.