On Saturday 15th August 1914, shortly after the outbreak of the First World War, the Worcester Motor Transport Company Limited was formed to take over the bus routes of the Worcester Electric Traction Company Limited, following the merger and reorganisation of a number of companies in the Worcester and Kidderminster area. One of the routes operated by this new company was between Worcester and Bromyard.
Within a few months the entire omnibus fleet operated by the Worcester Motor Transport Company Limited (except for a few spare bus bodies) was commandeered by the War Office for use as troop transport vehicles. This started in September 1914, and as a result the company was soon unable to operate. However, the petrol-electric vehicles operated by the Birmingham and Midland Motor Omnibus Company Limited (BMMO—Midland “Red” Motor Services) were not favoured by the War Office, and so that company did not loose any of their vehicles to the war effort. BMMO was able to take over the entire network of the Worcester company from Wednesday 4th November 1914, and so from that time they operated the Worcester to Bromyard route as Service 32.
Service 32 was operated by the Birmingham and Midland Motor Omnibus Company Limited (BMMO—Midland “Red” Motor Services) from Wednesday 4th November 1914, between Worcester and Bromyard, initially using a vehicle housed at Worcester (St John's) depot.
BMMO started operating omnibus services in Hereford on Wednesday 17th March 1920, with three petrol-electric Tilling-Stevens TS3 single-deck buses from Hereford (Black Lion) depot. Soon afterwards, Service 32 was extended from Bromyard to Hereford to provide a connecting service between the two cities. However very few journeys ran the whole route, with most journeys only running as far as Bromyard from either end, typically on market days. The May 1923 timetable shows the only journey running the whole route between Worcester and Hereford was on a Sunday, but by August 1924, there were also full journeys on Wednesdays and Saturdays.
A second return journey over the whole route on Sundays was added by the end of 1924, but passengers were required to change to a connecting bus in Bromyard. By early 1925, the wait for the connecting journey in Bromyard for passengers using the afternoon bus towards Worcester had grown to over an hour, so it can be assumed the vehicle was used on another route while people waited, although the timetable does not show other routes in the Bromyard area at that time.
Until c. 1924, omnibuses departed Worcester from Little Angel Street, but following the demolition of a number of building this was significantly widened and renamed to Angel Place. Services to Bromyard and Hereford continued to depart from this site until Newport Street Bus Station opened in 1946.
On Saturday 16th May 1925, BMMO renumbered their entire network and routes in the Worcester area were numbered into the range 259–301. At that time, the Worcester, Bromyard and Hereford route became Service 301, but this lasted for less than 3-years and following a second renumbering on Saturday 11th February 1928, the Worcester, Bromyard and Hereford route became Service 420.
| 3 | 2 |
| May | 1923 | Worcester ↔ Bromyard ↔ Hereford | |
| August | 1924 | Worcester ↔ Bromyard ↔ Hereford | |
| February | 1925 | Worcester ↔ Bromyard ↔ Hereford | Withdrawn May 1925 |