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#4 in Best Cordless Vacuum Cleaners in the UK for 2026
Best lightweightWATTB90/100

Dyson V12 Detect Slim

Our verdict · Most of the Dyson magic in a notably lighter, easier-to-handle body.

Buy it if

You find flagship cordless models tiring to lift and want laser detection and a particle counter without the bulk.

Skip it if

You have thick carpet throughout or a very large home, where the smaller bin and lighter motor show their limits.

Where to get it

Dyson V12 Detect Slim

WATTB Score

90/ 100

Our research-based editorial assessment.

How we score →

From ~£379 (indicative; RRP £479)

Indicative price at the time of review.

Compare prices

Opens a live price comparison and retailer search for current prices and availability.

The V12 Detect Slim is the pick for anyone who found earlier Dysons too heavy. At around 2.2kg it is markedly easier to carry up stairs and hold overhead, yet it keeps the headline tech: the green laser on the Fluffy head that lights up fine dust on hard floors, the piezo sensor that counts particles on the LCD, and Dyson's sealed whole-machine filtration. Run time is up to roughly 60 minutes and the 0.35L bin is smaller than the flagships, so it suits flats and small-to-medium homes better than large houses with lots of carpet. It also has less raw power in reserve than the Gen5detect, but for the money it is the most manoeuvrable serious cordless here.

The good & the bad

Pros

  • Genuinely light and easy to manoeuvre on stairs and overhead
  • Keeps the laser dust detection and particle-count LCD
  • Sealed filtration and strong suction relative to its weight

Cons

  • Smaller 0.35L bin needs emptying more often
  • Less headroom on deep carpet than the Gen5detect

How it compares

PickWATTB ScorePriceBest for
1.Dyson Gen5detect96/100From ~£699 (indicative; RRP £849)overall
2.Shark Stratos Cordless92/100From ~£349 (indicative; RRP £429)pet owners
3.Samsung Bespoke Jet AI88/100From ~£599 (indicative; RRP £699+)hands-free emptying
4.Dyson V12 Detect SlimThis pick90/100From ~£379 (indicative; RRP £479)lightweight
5.Vax ONEPWR Blade 480/100From ~£149 (indicative; RRP £220)budget buy
Swipe to compare

Key facts

Best for
lightweight
Typical cost
From ~£379 (indicative; RRP £479)
Run time
Up to ~60 min
Weight
~2.2kg
Filtration
Whole-machine sealed HEPA
Bin capacity
0.35L
Detection
Green laser head + particle counter

Researched by WATTB

Published
2 September 2026
Updated
2 September 2026
Last verified
2 September 2026

We research and rank options from public data, official information and published reviews. How we research →

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