The gap is forecast to rise by £4,000 in less than a decade, from £30,000 per head at the last general election in 2019 to £34,000 by 2028, according to the Centre for Economics and Business Research (CEBR).
The Bank of England has warned that Britain faces a two-year recession fuelled by double-digit inflation and tighter financial conditions.
The poorest regions will suffer the biggest impacts from the economic headwinds, economists said. The CEBR expects the economy to shrink by 1.2 per cent next year as the cost of living crisis, rising borrowing costs and weak global demand eat into output. The northeast of England and the west midlands are expected to suffer an above-average decline, with output falling by 2 per cent, because of their reliance on the manufacturing sector.