A MIDLAND manufacturing firm has seen its business double after starting a collaboration with Birmingham-based transport group National Express.Oldbury-based PLS designs and manufactures a range of wheelchair lifts for coaches.Its work with National Express means the transport group is now on track to be fully wheelchair accessible in 2013.The work has had a beneficial effect for PLS, helping it to pick up a string of national and international orders.PLS manufactures around 100 wheelchair lifts for National Express annually for us......for the full story register now for free or login below...