Every defence has one job. Here's what each one actually stops.
Thieves and disputes follow patterns — our data pages show exactly which ones. Each guide below matches one defence to one specific problem, tells you what to buy, and what changes once you own it.
The four theft routes and the witness
£10–£25
Keyless car theft takes under 60 seconds. A £15 pouch ends it.
Relay theft is the fastest-growing way cars are stolen in Britain — and it is completely defeated by a signal-blocking pouch on your hallway table.
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£40–£70
Thieves choose the easiest car on the street. Make sure it isn't yours.
A visible, Sold Secure-rated bar turns a 60-second theft into a noisy, tool-heavy job — so the thief moves on.
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£25–£50
Thieves can program a blank key to your car in minutes. This blocks the socket they use.
Key-cloning theft runs through your car's diagnostic port. A steel lock over it closes the route.
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£100–£300
If they take it anyway, this is how you get it back.
Deterrents lower the odds; a Thatcham-approved tracker changes the outcome when the odds lose.
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£50–£150
After a crash it's your word against theirs. Footage ends the argument.
A dashcam with parking mode is a witness that never blinks — for collisions, car-park hits and theft attempts alike.
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£60–£200
A catalytic converter is cut out in under two minutes. Replacing it costs four figures.
Cat theft targets the rhodium and palladium inside — hybrids worst of all. A bolted guard turns a two-minute cut into a job thieves abandon.
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£20–£40
Four alloys can come off a parked car in minutes. £25 of locking nuts keeps them on.
Wheel theft leaves cars on bricks and owners with a four-figure bill. One keyed nut per wheel removes your car from the shopping list.
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The home stack and the evidence layer
£20–£50
Most stolen bikes are simply lifted away in silence. 110 decibels changes that.
A pocket-sized lock that pins the brake disc and screams the moment the bike moves — the rider's first, best £30.
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£60–£150
At home is where bikes are stolen with power tools. Give them a problem measured in minutes, not seconds.
A Sold Secure Diamond chain through the frame into a concrete-bolted anchor is the difference between a theft and an abandoned attempt.
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£100–£300
Bikes vanish into vans. A hidden tracker turns 'gone forever' into a recovery.
When deterrents lose, location wins — and insurers often discount premiums for approved units.
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£50–£200
'Sorry mate, I didn't see you' — the five words that cost riders their claims. Film everything.
SMIDSY collisions are rarely the rider's fault and constantly disputed. A helmet camera ends the dispute before it starts.
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£25–£60
Thieves shop with their eyes. A £30 cover takes your bike off the shelf.
What can't be identified from the street doesn't get targeted — the cheapest layer in the home-security stack.
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Ready to buy? Ranked by attack rating, not commission
Updated August 2026
The best steering wheel locks, ranked by attack rating — not looks
See the rankings →
Updated August 2026
The best Faraday pouches and boxes — and how to prove yours works
See the rankings →
Updated August 2026
The best motorcycle disc locks — alarmed, rated, and actually pocketable
See the rankings →
Updated August 2026
The best motorcycle chains and anchors — graded by what a grinder does to them
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Updated August 2026
The best dashcams for claims evidence — parking mode is the half most people skip
See the rankings →
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