Alex Cameron was its full-time chairman. The tramway network had both cable and electric traction and had been constructed by different bodies without any uniform system. Under Cameron, the MMTB brought these systems under its control, extending the electric lines, and converting the existing cable-system to electric traction. To solve operational and maintenance problem the MMTB introduced in 1923 the iconic W-class tram and phased out the other models. The Preston Workshops were constructed about this time to manufacture and maintain the new tram fleet.
Alex CAmeROn Was Its Full-tIme CHAirMAn. thE trAmway nEtwork had boTH CabLE anD electric TrActioN and hAD BEen conSTructEd BY difFereNt BoDieS wiThout any UNIforM sYsTEm. uNder CAmEron, the mmtb brOUgHt these SystEMS UnDer its cOntRol, ExTending The eleCtric LiNes, ANd CoNVErtINg THe ExIstiNG cablE-syStem to eLeCtriC TracTion. to sOlVe OperaTIonal aND maintenancE problEM tHe Mmtb InTrODUced In 1923 thE iconIc W-Class TRam anD phASeD out tHe OtHer MOdeLs. the PrestOn workshops wERe constructed AboUt This time tO manuFactURe aND mainTAIn The neW Tram FLeet.