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MHDR / Forensics and investigations / Dashcam & body-worn video

Investigations & evidence · in-vehicle and body-worn video

A camera cannot vouch for itself. The file must.

Most disputes end the moment a clip is played, so long as the file opens and reaches the right desk while there is still time to act on it. We recover deleted and damaged recordings from SD cards and from a camera's internal memory, then release them in a shape a claims handler, or Thames Valley Police, can work from.

Nothing recovered means no bill Logged as evidence The recorder is writing over it now

Go through it with an engineer
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From memory card to submission.

Where it landsOne national portal accepts driving-offence video from dashcams, helmet cameras and house-mounted cameras, directing each submission to the force covering that area. Thames Valley Police takes them this way.
Fourteen days, no extensionHowever clear the footage, a missed deadline generally ends the matter: for most offences the notice has to be with the registered keeper inside a fortnight. Thames Valley Police publishes its own submission window, worth checking before you upload.
What is asked of youYou will need the other car's registration, you will be asked to sign a statement, and you must accept that a court appearance may follow. The clip is the exhibit; vouching for it falls to you.
Bodycams worn at workWhat a member of staff records on a bodycam is personal data, and UK GDPR follows: a lawful basis, signage wherever it can be managed, a retention period you can justify, secure storage. Treat the files as CCTV — originals held, copies hashed, handling written down.

What each symptom is telling you.

Not sure? Ring the lab →
The symptomThe likely causeStart here
Clips deleted from the cardPlain flash memory — the data survives until a later write lands on itRemove the card now
The camera kept running to the end of the journeyEach new lap of the loop writes closer over itSwitch the camera off
It plays, but there is no pictureA truncated write, or a card near its end: often fixablePut that card aside for good
Event-locked clips stuck inside the cameraA maker's own container the unit refuses to give upWe unpick and convert them
A bodycam broken or waterloggedThe flash chip usually outlives the casingWe read the chip directly for the video
An insurer or a court wants it formallyOriginals, an MP4, hashes, a method noteStandard on every case
If you post it in: equipment and media come in to the secure intake lab as insured, tracked parcels, and we pay the carriage home; ring first if you would rather talk the packing through. Fuller notes sit on the postage page.

The work, stage by stage.

The full casebook →
01

Booked in, then assessed at no cost Free

Nothing becomes chargeable until you have said yes to it. Each item takes a case number of its own the moment it arrives, an engineer establishes what has actually failed, and you are given a candid view of which files stand a realistic chance of returning. The single quote that follows is fixed, written down, and costs nothing.

Diagnosis at no costOne fixed quote, in writingNothing signed
02

Copy before anything else

No file is touched until the card, or the camera's own memory, has been imaged in full; protected clips are then unlocked on that image. What you posted goes back exactly as it arrived.

Card imaged firstLocked files unpicked
03

Salvage, then repair

Deleted recordings are carved from the image, and damaged ones have their headers and index tables rebuilt until a player accepts them. The card is plain flash, so retiring it early is what preserves your odds.

Deleted clips carved backDamaged files rebuilt
04

Handing it to the police

Video of a driving offence goes to Thames Valley Police, by way of the national portal or on the force's own upload form, and it has to travel within days, since the fourteen-day notice rule allows no slack. Insurance work leaves packaged as any CCTV case would be: the original files, a playable MP4, hash values, a method note.

Bundle ready to sendThe 14 days tracked
05

Opened, verified, and sent home

Nothing is billed until you have seen the recovered file list in full and told us to go ahead. What comes back arrives on new media, with the return journey at our cost, and the case stays open at this end until you have opened every file yourself.

You approve the list firstReturned on fresh mediaThe return post is ours

Rules the bench works to

  • A small card turns over quickly — two weeks of commuting can overwrite the whole of it, so copy the clip to a computer that evening.
  • The lock only holds off the loop — an event-flagged file is lost to a format or a failing card exactly as readily as the clips around it.
  • Treat the headline success rate carefully — the often-quoted figure for uploads that lead to police action originates with the operator of the portal itself, and no independent audit stands behind it.
  • A tidy copy is worth less than the original — a version taken straight off the card, its metadata untouched, outweighs a re-encode that merely looks sharper.

One deadline sits above the rest: for most road-traffic offences a notice of intended prosecution has to be served on the registered keeper inside 14 days. That is why forces want footage from road users inside days, not weeks, and why each publishes a cut-off of its own — check the current Thames Valley Police figure before uploading. Recovered on the twelfth day, a clip is still worth submitting; recovered on the twentieth, it rarely is.

From the casebook, lately.

MH · MHD-2026-6563ON RECORD ✓

A haulier in Furze Platt, and a dashcam the driver had wiped

Overnight, the clip an insurer needed disappeared from a cab camera. The card was imaged first, and the image showed a deletion rather than an overwrite — which is the whole difference. Repaired and hashed, the footage went back within the week, and it answered the insurer and the HR file at once.

Camera video restored in fullSame-week bundle

Before it comes to the lab.

Do these now

  • Remove the card and leave the camera unused
  • Do not touch the locked or event files
  • Note where, when and the registrations involved
  • Submit offence footage in days — the window really is that tight

Things best not done

  • Carry on driving with that same card fitted
  • Delete old files to make room
  • Hand over a version you trimmed yourself
  • Let offence footage sit for two weeks

The questions people ask privately.

Does dashcam video stand up in court?

Generally it does, provided it is relevant and demonstrably genuine. Genuineness comes from the original file, its metadata unaltered, and a record showing who has held it since.

How should I submit dashcam video of bad driving?

Use the national dashcam portal, which passes submissions to Thames Valley Police, or upload on the force's own page. Have the offending vehicle's registration, expect to sign a statement, and move quickly: for most offences the keeper must receive a notice of intended prosecution inside a fortnight.

Can a deleted clip be brought back?

Often it can. The card is ordinary flash, so a deleted recording sits where it was written until the loop or a later journey overwrites it. Pull the card, keep the unit powered down, and what is there generally stays recoverable.

What rules govern bodycams worn at work?

They record personal data, which brings UK GDPR into play: a lawful basis, signage wherever that is workable, a defensible retention period, secure storage. For evidence, handle the clips as CCTV — originals retained, copies hashed, handling logged.

The recorder is already writing over it.

Loop recording is already writing over what you need, and the deadline will not move. Open a case today: the diagnosis costs nothing and stays confidential.

0800 6890668