Often, organisations will focus on a particular much loved company or operator, such as SELNEC, Southdown Motor Services or Ribble Motor Services, or particular manufacturers such as AEC or Bristol Commercial Vehicles.
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The earliest examples of bus preservation were undertaken by certain bus companies themselves, especially the London General Omnibus Company who set aside a member bus from the B, S and K classes, followed by the London Passenger Transport Board who preserved one each of the NS, LT, ST and T classes.
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In cases where large numbers of vehicles were produced, organisations may even concentrate on a single model, such as the Bristol VR or Leyland National.
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The route was operated with a Bristol SU single-decker acquired from a bus preservationist.