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Best rat poison: top pick and best value

Updated: 17 October 2026

If you want the best rat poison from these five amazon.co.uk listings, the decision comes down to what the evidence can actually support. Big Cheese Ultra Power is our top pick because its 4.5-star rating rests on 2,179 reviews, far more than any rival here. Rentokil Rodine is the best value at £7.10 and is the only extract that states its active ingredient. Neither includes the tamper-resistant station needed for use, and this is an editorial comparison of listings and reviews rather than a laboratory test. Peter F. checked these extracts on 16 October 2026. See the full [rat poison comparison](/hub/pest-control/rat-poison) for every product field.

If you want the best rat poison from these five amazon.co.uk listings, the decision comes down to what the evidence can actually support.

Our top picks

The Big Cheese Big Cheese all-weather blocks

Best overall

The Big Cheese Big Cheese all-weather blocks
8.6/10about £16.40
View offer
The Big Cheese Big Cheese Ultra Power blocks

Rank 2

The Big Cheese Big Cheese Ultra Power blocks
9.1/10about £10.42
View offer
Rentokil Rentokil Rodine grain bait

Best value

Rentokil Rentokil Rodine grain bait
8.8/10about £7.10
View offer
On this page
  1. 1.Top pick: Big Cheese Ultra Power blocks
  2. 2.Best value: Rentokil Rodine grain
  3. 3.When the other three are the better buy
  4. 4.What this ranking does not decide

Top pick: Big Cheese Ultra Power blocks

Ultra Power B077MDFHKM costs £10.42 for 15 blocks of 20 g. Its 4.5 out of 5 rating comes from 2,179 reviews, compared with 797 for Rentokil and roughly 500 for the two other established block listings. That larger sample does not prove a success rate, but it gives recurring practical complaints more weight than the 32-review Topline page. Buyers often report bait being taken from a station, while others describe waiting several days and occasionally noticing an odour when they cannot find the carcass. The listing names STV566 as the station to use, but the box is not included. Its amazon.co.uk extract also does not state the active ingredient. Skip it if you will not buy a separate station or need the active before checkout.

Best value: Rentokil Rodine grain

Rentokil Rodine B07BFQ1V5L is the lowest-priced bait in the set at £7.10 for a 200 g pack. It has 4.3 out of 5 from 797 reviews and, for a shopper comparing labels online, states brodifacoum 0.0025% w/w. That combination of the lowest shelf price, substantial review count and disclosed active makes it the best-value choice here. The listing says the grain sachets should remain unopened so rats gnaw through them inside a lockable, tamper-resistant station. The station is not supplied, and no compatible model is named. A review also disputes the sachet count, so check the delivered pack. Rodine has no damp-proof claim in this extract. It is the stronger value choice for a dry, sheltered station, not automatically for an exposed outbuilding where moisture regularly reaches the box. Our blocks versus grain guide deals with that site decision separately.
The Big Cheese Big Cheese all-weather blocks

Testsieger

The Big Cheese Big Cheese all-weather blocks
8.6/10about £16.40
View offer

When the other three are the better buy

Big Cheese all-weather B088RDWGP4 is the conditional alternative for a damp station. It is the only listing here that explicitly calls its blocks damp-proof, names STV179 as the separate station and includes gloves. Its 4.6 rating is the highest headline score, but it comes from 499 reviews and the £16.40 price is the highest in the set. The title and the 300 g specification disagree. Choose it for the damp-proof claim, not because 4.6 exceeds 4.5. Roshield B0BTYTLGL5, at £13.59 with 4.5 from 513 reviews, may suit an existing station, but the title says 700 g while the specification says 840 g, and the active is unstated. Topline paste, at £15.95, has a 4.5 line from only 32 reviews, with no stated active and no station in the extract.

What this ranking does not decide

The scores compare listing clarity, price, review volume and recurring review signals. They are not laboratory performance scores, and no product here has been personally tested by the Products Compared editorial team. A high star average cannot establish how quickly a bait controls rats, whether local resistance affects an active, or whether a particular infestation will respond. Likewise, single feed and one feed are label claims, not a promise of a visible result within 24 hours. Anticoagulant bait can involve further feeding and a delay of days. Follow the exact pack instructions for the product in your hand, and do not copy a dose or visit schedule from another model. Safety and authorisation come before the ranking. Buy only a general-public pack for your intended place in or around buildings, and budget for a suitable lockable station.

Common questions

Which rat poison is the top pick in this set?
Big Cheese Ultra Power B077MDFHKM is the top pick because its 4.5 rating is supported by 2,179 reviews and the £10.42 price is mid-range. Skip it if you need the active stated online or do not already have, and will not buy, station STV566.
Which product is the best value?
Rentokil Rodine B07BFQ1V5L is the best value at £7.10. It has 4.3 from 797 reviews and is the only listing here to state brodifacoum 0.0025% w/w. Its grain has no damp-proof claim, and a lockable station costs extra.
Why is the 4.6-star product not the top pick?
The Big Cheese all-weather blocks have 4.6 from 499 reviews, but cost £16.40 and have a pack-weight conflict. Ultra Power’s 4.5 is supported by 2,179 reviews. The all-weather option becomes preferable when its specific damp-proof claim matters.
Does Ultra Power include STV566?
No. The listing names STV566 as the station to use, but the included components are the 15 bait blocks. Add the station cost before comparing the total purchase with another bait-and-box combination.
Is Ultra Power’s active stated on Amazon?
Not in the amazon.co.uk extract used for this comparison. A manufacturer page may provide information for model STV568, but the buying decision here records what the exact marketplace listing prints. Check the delivered label before use.
Does one feed mean same-day control?
No. It is not a 24-hour promise. STV says rodents may continue to feed for up to four days, and reviews mention waiting days. The pack label sets the relevant instructions and review period for your product.

Related pages

Rat poison buying guide

Rat poison bait stations

Rat poison

Rat poison blocks vs grain: which form fits the site

How to use rat poison safely in the United Kingdom

Sources

Public UK sources used for this comparison; last checked on 16.10.2026.

  1. HSE: Using biocides (retrieved 16.10.2026)
  2. HSE: Rodenticides (retrieved 16.10.2026)
  3. HSE: SGAR bulletin on open areas (retrieved 16.10.2026)
  4. Think Wildlife: bait station label criteria (retrieved 16.10.2026)
  5. CRRU: training and professional supply (retrieved 16.10.2026)
  6. GOV.UK: Pest control on your property (retrieved 16.10.2026)
  7. NHS: Poisoning (retrieved 16.10.2026)
  8. BPCA: Rat control (retrieved 16.10.2026)