CIVIL engineering and support services group Carillion has reported enhanced annual earnings and an increase in pre-tax profits of 16% despite the challenging economy.The Wolverhampton-based group saw revenues increase by 4% last year to £5.4bn, compared with £5.2bn the year before – the figure attributable to a “resilient business mix in challenging market conditions”.Carillion (CLLN) also saw an improved operating margin of 4%, with the margins in its support services division increasing to 4.9%, com......for the full story register now for free or login below...