(Sharecast News) - Infrastructure solutions group Costain confirmed on Tuesday that current trading is in line with expectations as it sounded an upbeat note on the outlook.In a very brief update ahead of its annual general meeting - after which Alex Vaughan will take on the role of chief executive as Andrew Wylle retires - the company said it remains confident in the future.At 1040 BST, the shares were up 1.2% at 328.82p.