I refer to the article Trolleybuses Back On Road (The Argus, May 5). The bus in the photograph is a former Brighton Corporation bus dating from 1962.

It may have been used to revive former trolleybus routes but it certainly was not converted from a trolleybus to motor power as you state. It always has been a diesel bus.

A trolleybus is non- polluting and silent, ideally suited to hilly routes, and it runs on mains electricity, the cables for which are suspended above roads where it runs. Roof-mounted collectors take the electricity to the vehicle. It is a cross between a bus and a tram.

Trolleybuses are an everyday form of transport in many cities throughout the world including Geneva, Lyon, Moscow, San Francisco, Vancouver and Wellington.

Two former Brighton trolleybuses still exist. One (CPM 61) is a static exhibit at the Science Museum in Wroughton, Swindon, the other (LCD 52) operates at the East Anglia Transport Museum, Lowestoft, and has been fully restored to Brighton condition internally in recent years.

Externally though it is in Maidstone’s brown and cream colours, for it was sold to Maidstone Corporation and ran there until 1967.

Andrew Henbest Sheridan Road, Worthing

Editor’s note: Thanks to Mr Henbest and several other correspondents for pointing out the error in the trolleybus story. We said both buses featured were owned by Duncan Richardson and had been converted into motorbuses. In fact one is owned by Brighton and Hove Bus and Coach Company and neither had been converted.