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Hillclimbing in Great Britain differs from the style of hillclimb motorsport events staged in many other parts of the world, in that courses are generally short — mostly under one mile (1.6 km) in length — and this means that cars and drivers do not generally cross between British events and the longer hillclimbs found in many other parts of Europe.
In the United Kingdom, hillclimbing is considered a spectator sport, and the most prestigious events, such as those that form part of the British Hill Climb Championship, often attract several thousand enthusiasts to the hills. All the courses in Great Britain are situated on private land, but some events in the Channel Islands and all events in Northern Ireland are held on closed public roads. Track lengths are traditionally quoted in yards: the longest hillclimb course in the UK is Cairncastle at 2904 yards (2655 m) and one of the shortest is Val des Terres at 850 yards (777 m).
The Scottish championship has long been associated with names like Grampian TV and Guyson. Doune and Fintray continue to be included in the championship along with newer venue Forrestburn. Two other venues, Rumster and Kinkell are no longer in use. A notable feature of British and Irish hillclimbing is the very wide variety of vehicles used for competition. Both cars and motorcycles (including sidecars) take part in the sport, and in the case of cars these range from almost standard machines (sometimes driven to and from the tracks) with the only modifications being those required on grounds of safety, right through to specially-built single-seater racing cars. Classic and vintage cars are also very popular in hillclimbing. Generally there are separate meetings for cars and bikes, but occasionally both appear at the same event.
In Great Britain, there is a system of classes which groups cars into broadly similar categories. For example, the classes for "Racing Cars" (i.e. single-seaters) are divided into those for cars with engine capacities of under 600cc, 600–1100 cc, 1100–1600 cc, 1600–2000 cc and over 2000 cc. The cars in the unlimited capacity class often use engines from, or derived from, Formula One cars, and occasionally F1 cars themselves have competed. Motorcycles are generally classified by engine capacity, though separate classes exist for trikes and sidecar outfits. Drivers entered for the British Hill Climb Championship may qualify for a "run-off" at the end of each set of class runs, and it is here that BHCC or NHCA championship points are scored.
It is common for two drivers, often but not always related, to share the same vehicle at a hillclimb. Such entries are known as "dual-driven" (or, occasionally, "double-driven") cars or bikes. Usually drivers considered the slower in such partnerships will make the climb first, before the bulk of the class for which they have been entered. This therefore allows their companions to make their ascent within the same time frame as the competitors, to ensure similar track conditions. Other than this, there is no special consideration for drivers in dual-driven cars, and both drivers count their results (and, if appropriate, score points) individually.