xii. apparent mechanical failure or of a fire which might not be obvious to the Driver. The Vehicle concerned must call at its pit for repairs on the next lap. Black and White Rectangular Signal split diagonally and displayed with the Competitor’ s number: A warning to the Driver that their behaviour is suspect and that they may be Black- Signalled on further reports. xiii. Black Signal displayed with the Competitor’ s number: The Driver must stop at their pit on the next lap of receiving the Signal and report to the Clerk of the Course. A penalty of disqualification may be enforced by display of the Black Signal. xiv. Black and White Chequered Signal: End of session. xv.
Hazard Area Board: A warning of a hazard that was not present when the sesson commenced. d.
At an incident where the Track is obstructed or Marshals are working at the trackside the following Signals will be used:
i. A‘ waved’ Yellow Signal at the post before a double‘ waved Yellow Signal.( This‘ waved’ yellow Signal may also be supplemented or replaced by flashing yellow warning lights). ii.
A double‘ waved’ Yellow Signal at the post immediately preceding the incident.( These‘ waved’ yellow Signals may also be supplemented or replaced by flashing yellow warning lights). iii. A‘ waved’ Green Signal at the post immediately after the incident. iv.
If the incident is well off the Track and Marshals are not working at the trackside, the incident may be indicated by a single‘ waved’ yellow Signal followed by a‘ waved’ green Signal or by a Hazard Area board. e.
f.
g.
h.
i.
Overtaking or not slowing down is an offence from the point of passing the Yellow Signal until the Green Signal is passed.
If a hazard has been indicated by Yellow Signals as above then the Signal may be withdrawn even though the hazard remains. It will then be indicated by a Hazard Area Board at the Signal post preceding the hazard. It is then the Competitor’ s responsibility to take appropriate care.
When a Session is stopped by the Red Signal,( Art. 11.2. c. x) the Clerk of the Course is not obliged to resume the Session.
Other than the Starter’ s Signal the minimum size for any Signal or appropriately coloured signal panel( Art. 11.2. c.) is 75cm x 60cm.( N. B. International Regulations require the Red Signal to be 80cm x 100cm minimum).
Once the Black and White chequered Signal has been displayed the Competition is over, and may not be restarted.
Motorsport UK National Competition Rules 2026 Edition 1
Chapter 14 Appendix 5- Specific Regulations for Hot Lap Challenge 550