United Kingdom
Cap in the app: 80 km/h.
Speed
60 mph (96 km/h) on dual carriageway and motorway, 50 mph (80 km/h) on single carriageway. A motorhome over 3.05 t unladen: 70 mph on the motorway.
Source. GOV.UK
Dimensions — verified from the C&U Regulations 1986
Source: The Road Vehicles (Construction and Use) Regulations 1986/1078, Part II, the consolidated text in force, retrieved 2026-08-07.
| Dimension | United Kingdom | Article |
|---|---|---|
| Length, outfit | 18.75 m | reg. 7(1) table entry 1 (amended, F1) |
| Length, car | 12 m | reg. 7(1) table entry 4 |
| Length, caravan | 7 m, drawbar excluded | reg. 7(1) table entry 9 |
| Width, car | 2.55 m | reg. 8(1) entry 3 (F39) |
| Width, caravan | 2.55 m | reg. 8(1) entry 4 (F40, SI 2010/964) |
| Height | no general limit; bus 4.57 m | reg. 9 |
The seven-metre limit is the sharpest deviation in the whole section. Table entry 9 reads "Any other trailer not being an agricultural trailed appliance or a semi-trailer — 7", and the twelve-metre entries in the table are not open to a caravan: entry 8 requires the trailer to be drawn by "a goods vehicle being a motor vehicle having a maximum gross weight exceeding 3500 kg" or to be an agricultural trailer. Against Sweden's 12.0 and Finland's 12.50 that is five metres shorter. Reg. 3 defines overall length for reg. 7 so that "any part of a trailer … designed primarily for use as a means of attaching it to another vehicle" is left out — the seven metres are therefore the caravan without its drawbar. An exception exists for showman's vehicles: reg. 7(2) gives 22 m instead of 18 where the trailer is living accommodation, but that applies to fairground people in a commercial sense, not to a holiday.
The height row rests on the limits having been repealed, not on their being absent: reg. 9 paras. (2), (2A) and (3) stand as F44 . . ., F45 . . ., F46 . . ., and what remains is only the bus rule of 4.57 m. Reg. 10 requires a height notice in the cab only above 3.66 m, and only for skip, container and construction vehicles.
The trap here is the same kind as the Finnish one, but with a different mechanism: /made. The first retrieval went to legislation.gov.uk/uksi/1986/1078/part/II/made/… and gave the original 1986 text — 18 m outfit, 2.5 m car, 2.3 m trailer. All three figures have long since been amended; the trailer width was raised to 2.55 by SI 2010/964. The same address without /made gives the text in force. The authority is not lying, it serves two versions and /made is the historical one. The rule: check the version before you quote it, not after. The receipt stands in the text — [ F39 | 2.55 ] means the value has been replaced, while entry 9's bare 7 is original wording that has never been amended.
The widely repeated claim that British caravans may be at most 2.3 m wide is therefore a quotation from a text that has not been in force for sixteen years.