World War II saw the firm restricting the number of vehicles to 12 despite the heavy passenger demands operating to and from essential industries, working a daily three-shift operation. By 1950 McVicars had 31 vehicles in daily service and several others in the workshop. The peak period for the private bus industry was said to have been up to the mid-1950s. There were relatively few cars on the roads and bus patronage was high, with timetables drawn up in a way to attract customers rather than economic necessity. However, with rising costs from big wage claims and declining patronage to greatly increased car usage, the company this time suffered difficulties though this was partly offset by revenue generated from the school bus services.
