ACCOUNTING BLUNDERS

HBOS bank was given a clean bill of health by KPMG before it collapsed in 2008

Deloitte was fined £3m for a failure to manage conflicts before the collapse of MG Rover

A £ 326m accounting error at Tesco was missed by PwC in 2014

KPMG overlooked a £1.5bn black hole at the Co-op Bank in 2014

PwC was fined £5.1m in 2017 for missing problems at accountant RSM Tenon

Last year KPMG was fined £3.2m over a scandal at software firm Quindell

All the Big Four worked for Carillion without highlighting problems