How the collapse of one of Britain’s biggest building firms will hit Labour’s prison and schools plan

ISG has a contract to overhaul HMP Liverpool Prison - (AFP via Getty Images)

Dozens of schools and prisons around England and Wales face higher bills and delays to new buildings worth billions of pounds after the collapse of one of the UK’s biggest contractors.

ISG, the sixth-biggest builder in the UK, collapsed in September, leaving 2,200 workers immediately redundant and many subcontractors out of pocket. At least one firm working for ISG has gone under.