Midland Red Omnibus Company Limited (MROC) introduced their “Wandaward†MAP scheme in the Hereford area on Saturday 11th March 1978. This saw a large number of services withdrawn and a number of rural services were renumbered with ‘H’-prefix route numbers, which had previously only been used for local Hereford services. At this time, short-working Service 420 Thursday evening journeys between Hereford and Bromyard were renumbered to Service H20, but all daytime journeys were still numbered Service 420.
Changes were made to the “Wandaward†network on Saturday 30th August 1980 which included rerouting Service 420 to run via Withington Village, and at this time all Service H20 journeys were renumbered back to Service 420.
| H | 2 | 0 |
| May | 1978 | Hereford ↔ Bromyard |