By Guy Taylor News that ISG, the sixth biggest construction contractor in the UK, filed for administration on Friday has reverberated across the sector. It has, understandably, drawn comparisonswith the only larger collapse in UK construction history; that of Carillion in 2018. The impact is undeniably huge. Beyond more than 2,000 jobs are getting the axe and a huge number of government construction projects may yet be paused, including work with the Ministry of Justice to significantly increase the capacity of Britain’s overcrowded prisons. But the crisis engulfing ISG raises questions about …