Legal guide

How to Appeal a Speeding NIP UK — Free Check & Guidance

Updated April 2026 · 7 min read

A Notice of Intended Prosecution (NIP) is a formal notice issued under the Road Traffic Offenders Act 1988 informing you that a prosecution is being considered for a speeding offence. It is typically accompanied by a Section 172 notice requiring you to identify the driver of the vehicle at the time of the alleged offence.

What you must do first — regardless of any challenge

You must respond to the Section 172 notice within 28 days. This is a separate legal obligation from any challenge to the NIP itself. Failing to identify the driver is an offence under s.172 Road Traffic Act 1988 that carries a mandatory 6 penalty points and a fine — potentially more serious than the original speeding offence.

You can respond by confirming you were the driver, or by providing the name and address of the driver if it was someone else. If you genuinely cannot identify the driver (for example, a company vehicle with multiple users), you should seek legal advice.

The 14-day NIP rule — the most common procedural ground

Under s.1 Road Traffic Offenders Act 1988, a NIP relating to a fixed camera offence must be served within 14 days of the alleged offence date. This means the NIP must actually be received within 14 days, not just posted.

If you received the NIP more than 14 days after the date of the alleged offence, and the offence was detected by a fixed camera (as opposed to a police officer), you may have a procedural defence. This is a technical legal point and requires you to demonstrate when the NIP was received — retain the envelope if possible and note the postmark date.

Note: the 14-day rule applies to service on the driver or registered keeper. If the NIP was served on the registered keeper (who may not be the driver), the timing rules can be more complex. Seek specialist advice.

Other grounds to challenge

Wrong vehicle

If the registration plate on the NIP does not match your vehicle, or the vehicle shown in any camera image is not yours, provide your V5C and any other evidence confirming your vehicle's details. Camera misreads do occur. If the NIP identifies a different vehicle, you are entitled to say so in your response.

Speed limit signage issues

If there was ambiguity about the speed limit at the location — missing, obscured or non-standard signs, a temporary speed limit not properly signed, or a transition zone where the limit had recently changed — this may be relevant to a defence. Photograph the signage at the location as soon as possible. Note that this is an evidential matter and usually requires specialist legal advice to pursue effectively.

Camera calibration and type approval

Speed cameras must be of an approved type and regularly calibrated. In practice, challenging the accuracy of approved, maintained equipment is very difficult and rarely succeeds without expert evidence. This is a specialist legal area and beyond the scope of a self-represented challenge.

Genuine emergency

A genuine, documented emergency — rushing a person to hospital, responding to a life-threatening situation — can be raised as mitigation, though it does not technically constitute a legal defence to speeding. Courts have discretion in these circumstances, and documented evidence (hospital records, 999 call logs) is essential.

The process after responding to the NIP

Once you have responded identifying the driver, one of three things typically happens:

• You are offered a speed awareness course (for lower-level offences, if eligible) — completing this means no penalty points and no prosecution.
• You are offered a fixed penalty notice (FPN) — 3 penalty points and a £100 fine. You can accept or elect to go to court.
• A summons is issued to appear in the magistrates' court — for higher speeds or repeat offences.

If you elect to contest the charge in court, you will have the opportunity to raise your grounds formally. Court proceedings for speeding offences are heard in the magistrates' court. If you are contesting on procedural grounds (such as the 14-day rule), specialist motoring law representation is strongly advisable.

Seeking specialist advice

Several UK firms specialise in motoring law and offer free initial consultations for NIP matters. Given the criminal nature of speeding proceedings and the complexity of procedural defences, professional advice is strongly recommended before contesting a NIP beyond simply identifying the driver.