In January 1991, the Eastern Division of National Welsh, which included depots in Cwmbran, Crosskeys, Brynmawr and Chepstow, was sold to Western Travel Group.
From 1986 to 1992, Bustler was the registered service name and brand used by National Welsh for a large fleet of minibuses in a chrome yellow livery, featuring blue, red and white stripes.
Whilst comfort was not their strong point, the five- to ten-minute frequencies transformed patronage levels in the towns of Aberdare, Barry, Bridgend, Cwmbran, Ebbw Vale, Penarth, Pontypridd, Porth, and Tredegar.
The minibus catered for a commercial need at the time when many other privatised bus companies saw it as a way of maintaining market dominance and giving something the public wanted - a high frequency service without the need to consult a timetable.
The Bustler name (in a different typeface style) was also used by a former London Country Bus Services operation following privatisation, but the company agreed to remove the name within two years at the formal insistence of National Welsh.
Subsequently, the company's depots were closed or sold: On the demise of National Welsh, the name Bustler quickly vanished from the roads of South Wales.