Liverpool and Prescott Light Railway
The Liverpool and Prescott Light Railway were operated by the New St Helens and District Tramways Company from its opening in 1902 up to 1919 when the line was taken over by Liverpool Corporation. So far, I have failed to find a single photograph showing a conductor or motorman on a L&PLR tramcar. The uniforms were however almost certainly identical to those used by staff of the New St Helens and District Tramways Company who worked the St Helens Corporation system, given that it was from teh same depot, albeit with differently liveried cars. Photographic evidence for that system is however also extremely sparse (see link).