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By 1935 Wolseley were using the Pytchley roof and by 1936 Austin too were also selling models with the sliding head. The sliding panel also incorporated locks which allowed the panel to be fixed at any position from fully closed to fully open. This comprised a panel which could be slid back over the roof behind to create an opening above the driver and passenger. Morris built several models using Pytchley's technology from 1932, including the Morris Minor, Morris Major and Morris Ten adding what became known as a Sliding Head (using the term head in the same way as Folding Head or Drop Head).

By 1929 the design had improved so that when closed the moveable panel was flush with the rest of the roof. It was factory fitted to vehicles from a number of different manufacturers. In 1927 they claimed for a Daimler 20/70 hp that 'This roof slides at the touch of a finger and opens up 50% of the roof area giving greater visibility and more air without draughts.' The sliding roof system evolved from a device that Pytchley installed themselves, to an option which manufacturers offered as a standard body style. At first Pytchley used their sliding roof system to build a number of coach-built, custom 'tourer saloon' automobiles sold from their premises at 201 - 203 Great Portland Street London. The Pytchley mechanism was both patented and first publicly demonstrated in 1925. The entrepreneur Noel Mobbs laid the foundation of the volume sunroof market when he evolved his coach building business into a company dedicated to the manufacture of sliding roofs in the name of Pytchley. This evolution was eventually not limited to luxury motoring. These part-time roofs, sometimes at first just a stretched piece of leather, became more sophisticated comprising frame elements and leather or water-resistant cloth to form the construction, and installations even included spaces provided to store the parts when not in use. In order to provide better shelter for the driver therefore, temporary cover was now demanded. Road speeds were increasing and vehicles were changing from occasional use to full-time transport meaning that they were increasingly being used in bad weather. An open cabin allowed the driver to be more connected to their surroundings, demonstrated that the car's owner employed a paid driver (one reason chauffeurs wore uniform) and identified the owner through the driver's livery (the other reason for the uniform). A common configuration for early automobiles included a fixed roof for the rear passenger compartment and an uncovered section for the chauffeur in a style known as Coupe de Ville, Sedanca (two door) or Sedanca de Ville.

Car sunroof installation in bangalore dating