4.4. It is recommended that any safety cell is periodically inspected on a regular basis.
5. Fuel Systems
5.1. Must have any fuel lines passing through the Driver / Passenger compartment protected and, if nonmetallic, to be internally or externally metal braided hydraulic pressure hose or fuel lines complying with FIA specifications.
5.2. Fuel lines may only be joined by screwed sealing joints or vehicle manufacturers approved joint.
5.3. If fitted with fuel fillers in a closed boot, or under closure, have collector / spill trays incorporated to drain outside the Vehicle.
6. Fuel sampling
6.1. With the exception of Vehicles competing in Sprint and Hill Climb Standard Cars and Road Cars Categories, Vehicles competing in British and ASN Titled Championships for, and all Vehicles built after 01 January 2013 for, Rallycross, Car Racing, Special Stage Rallying, Sprints and Hill Climbs must be equipped with the facility to enable a fuel sample to be taken.
6.2. For fuel injected Vehicles the facility must be a dry break fuel sampling coupling, approved by the FIA, Competitors must carry and make available a 300mm minimum length of hose to which, where necessary, the appropriate mating part is to be attached.
6.3. The fuel system must have sufficient fuel for a fuel test( Chapter 8) present at any time during the Event. Breach of this Regulation will give rise to Disqualification( Chapter 2) from the Results of the Event on the principle of a breach of Technical Regulations.
7. Methanol and LPG
7.1. If using Methanol a 70mm diameter‘ Day- Glo’ orange disc must be affixed immediately adjacent to the Competition Numbers on both sides.
7.2. Any Vehicle using methanol must include an ASN-approved additive which provides a distinguishable colour and smell when burning. The maximum permitted volume of additive within the fuel is 0.2 %.
7.3. If using LPG, the entire system must conform with Construction and Use Regulations and LPG Industry Technical Association Codes of Practice in force at the date of the Event.
Motorsport UK 2025 National Competition Rules Version 11
Chapter 7 Appendix 4- Fuel and Fuel Systems 261