ENGINEERING group GKN has said its second quarter business remains in line with performance during the first three months of the year and has told shareholders to expect a 20% increase in the interim dividend.The Redditch-based group said sales in the first five months of the year increased 17%, with underlying sales up 9%.  Management trading profit increased 23%, up 13% on an underlying basis.    Automotive division GKN Driveline saw underlying sales grow 10%, although this was temporarily flattered by last year's ......for the full story register now for free or login below...