Carillion was liquidated after contract delays and a slump in business left it swamped by debt and pensions liabilities., triggering Britain's biggest corporate failure in a decade and forced the government to step in to guarantee public services from school meals to roadworks. Interserve Chief Executive Debbie White reiterated that the company's fundamentals were strong and that the debt reduction plan, first raised in a refinancing in April, had the support of 10 Downing Street. Interserve, which is also one of the main builders of UK schools and the largest provider of probation and offender rehabilitation services in England and Wales, warned in November that its debt would rise more than expected this year, hurt by project delays and a weak construction market.