Jaguar Land Rover has reported a heavy loss for the three months to the end of September, a period during which it was badly affected by the impact of a serious cyber-attack.

The carmaker posted a £485m loss – before tax and exceptional items - compared with a profit of £398m for the same period a year ago.

The cyber-attack, which took place at the end of August, forced JLR to shut down its computer networks, leaving it unable to operate its highly-automated production lines throughout September and into early October.

Car sales to consumers were also affected initially, although JLR was later able to develop workarounds, and parts supply to service outlets was badly disrupted.

The company says production has now returned to normal levels.