My hon. Friend the Member for Kilmarnock and Loudoun referred to the collapse of Carillion. The impact of Carillion's collapse on the construction industry and the wider public sector is well documented. However, it would be remiss of me not to highlight the fact that Carillion went into liquidation owing more than £1 billion to 30,000 suppliers, many of which were smaller firms that subsequently suffered major cash-flow problems because Carillion demanded up-front payment. Carillion's collapse demonstrates how vulnerable smaller companies can be in the supply chain. It is the tip of the iceberg.