Between Sunday 5th September 2010 and Monday 3rd June 2013, Service 144 operated every 30-minutes during the day, Monday to Saturday, between Worcester and Birmingham, inter-worked with short-working journeys between Worcester and Catshill to give a 15-minute frequency on that section of the route.
Service 144A was introduced to distinguish the short-working journeys from the full-length journeys.
Service 144A was the first, and so far the only 4-digit route number operated by Midland Red.
Service 144A was introduced by First Midland Red Buses Limited on Monday 3rd June 2013 to distinguish the short-working journeys of Service 144 from the full-route journeys. From this time, all Service 144 journeys that terminated at Catshill were renumbered to Service 144A, and the route of Service 144A was also changed to include the grounds of Webbs Garden Centre near Wychbold. Service 144 continued to run direct along the A38.
From Monday 1st September 2014, certain journeys of Service 144A were extended to Halesowen and renumbered to run as Service 147, but this was short-lived and Service 147 was withdrawn on Sunday 10th April 2016. Journeys that operated as Service 147 were renumbered back to Service 144A and cut back to run only between Worcester and Catshill. From the same time, Service 144A no longer ran via the Princess of Wales Hospital with all journeys being diverted to run via Sidemoor.