The Tool Room was situated on the uppermost floor and comprised two sections: the original in the older building and another part in the newer extension, added to the factory in the early 1950s.
Separating the two sections was a dividing wall and a large automatic roller-shutter fire door (which was always open).
The work carried out in each section was different, with the 'older' tool room responsible for producing and maintaining all the jigs, fixtures and special gauges needed in the factory's machine shops
In contrast, the work in the tool room extension tended to be more creative and associated with development and the manufacture of one-off parts for the race shop.
Although there was one overall manager, the extension was overseen by a separate charge-hand
The range of equipment used in the tool room was similar to that found in the other factory departments, with the addition of specialist machines such as jig borers, shapers, radial drills and spark eroders that were needed for tooling.
Many of the personnel would have been "promoted" to the tool room from the machine shops, due to their higher skill levels and work accuracy, together with an ability to problem solve when the occasion called for it.
Others would have remained in the tool room after having spent the final year or so of their apprenticeship there, learning the trade first hand.