Alumasc, the listed building products group, is the latest firm to warn that the fall-out from Carillion is likely to be behind a slump in profits.

In March Kettering-headquartered Alumasc had said delays in new work plus the repercussions of the collapse in Carillion two months previously meant it expected pre-tax profit would be “around 15%” lower on turnover for the year to 30 June 2018 between 4% to 5% down on previous expectations.

But in a new update the firm, which manufactures water management systems and other building accessories and reported pre-tax profit of £9m in 2017, said the recent bad weather had compounded the situation and that along with the impact of Carillion’s liquidation it now expected underlying pre-tax profit to be between 15% and 20% lower than forecast.