May sales figures show Mercedes, Mitsubishi and Ford thrived
Growth is the first month-on-month since December
Vehicle registrations fell by 4.7%, but remain up 8.3% in 2013
Average resale price up 5.2% from May 2012, but last month saw £78 drop from April
38% increase in demand this year 'unprecedented', say Kettering-based company
LCV market booms by 43%, but drops in truck, bus and coach registrations
Eight bus operators and four councils set to share 83 single-deckers and 130 double-deckers