Leyland B21

The chassis was developed from the integral Leyland National and was designed for overseas markets,[1][2] with its biggest market being Australia.

[1][3] In Australia, Transperth purchased 20[4] and Darwin Bus Service 18.

[5][better source needed] Other purchasers included Benders Busways, Delwood Coaches, Melbourne-Brighton Bus Lines, Nowra Coaches and Surfside Buslines.

[1][8] Israeli operator Egged sought to import 150, but difficulties over financing saw the deal fall through.

[9] In the United Kingdom, Ipswich Buses purchased four and Ulsterbus six.